In 2021 the simmer ashubii started a thread by this name, which served as an inspiration to several of us. Now like many other threads the screenshots did not get transferred over, nor did it end up in the Sims 4 community but in the Sims Franchise Discussion instead. Since the OP does not seem to be active any longer, I have taken it on myself to salvage the post and its contents, as well as making it easy for more of us to contribute and build on the idea.
The original (with links instead of pictures) can be found here.
All credit for the idea and first post should go to ashubii , I'm just trying to make sure nothing gets lost.
Finally a little tip that has helped me a great deal. It does involve a mod (MCCC), but I figured it can't hurt anyway:
In CAS, create sims that are dressed in clothes you want to see on your NPCs. You need infant, toddler, child, teen/YA/adult and elders of both genders represented (MCCC can't distinguish between teen, YA or adult fashion, so all those will be in one category). Make sure to include accessories, as they will be included in the outfit.
Move your sims into a house and load it.
Click each sim, choose the MCCC-meny, choose dresser, outfit commands and finally save outfit.
Do this for each and every outfit you want your NPC sims to wear. (Yes, it's tedious, but so is changing everyone manually too). The more outfits you save, the more variation in the game.
When finished make sure there is a computer on the lot. Click the computer and the MCCC menu.
Choose dresser menu - Only Use Saved Outfits (means all new NPC will be generated in your chosen outfits) - Ages to Run on Age-Up (means sims will wear your chosen outfits when aging up. At minimum choose infant, toddler, child, teen and YA. Adults and elders will just keep their clothes in that case.)
Thanks! It's funny that the one decade that should be dead easy because I lived it was the hardest, possibly because it was hard to distance myself from the fashion.
For the noughties I've done something differently. Like with the 90s I've tried to focus on new styles rather than a full set of options for clothing, as there is so much to choose from. What I've done is that I've created a family. Dad, mom, two teenagers and two children (with toddlers and infants you can pretty much use everything in game by now). So let's start with dad.
Dad:
According to the catalogue fashion of the time (Sears and JC Penny) there were two types of men. The one who wore suits and sports jackets or at least shirts and chinos, and the rustic outdoors man with jeans, checkered shirts, knitted sweaters or layer on layer shirts over tops. Both had short hair (or shaved hair if he was growing bald) and a few days stubble. Colors he wore were earth tones, brown, blue, green, and some dark reds.
Teen and YA boys:
For teen boys the massive trend was spiky hair (this is not spiky enough) and t-shirt over a long sleeved shirt. Jeans could be really tight or really baggy and show off underwear, the type of pants that looked like it might fall off at any moment. Cargo pants were also popular, as were leather jackets. If you wanted to dress up, a black vest over a white T-shirt at least worked for Zac Effron.
Mom:
For adult women, the catalogue has a few different trends for everyday wear. Boot cut jeans, shirts that hang a little loose, and embroidery and "country" style, with some boho influences. Boots included the new sock-boot, which were very tight. Knitwear was also popular for women, and in the same earthy tones as men's fashion.
For dressing up, there was also a lot of trends going on. The "bandaged" dress was popular, but this was also the time of Halle Berrys fantastic Oscar gown, so obviously mom has gone for a look that is inspired by it. But women also started wearing suits more in festive events, and shiny satin tops combined with black skirts with uneven hemlines were also popular.
For underwear the big news was spanks and other shape changing underwear, and for swimsuits the new trend was the tankini.
Teen and YA girls:
What at 20-something should have been my fashion but never was (I was much more for the adult boho-trend), the major question for teens and young girls, was how low can you go without showing off your groin? Extremely low cut jeans, often coupled with crop tops was the major trend. The jeans could be replaced by cargo-pants that sat so low on the hip that any pockets probably were useless as added weight would probably make them slip off . Other major trends were the handkerchief-top and super short skirts. There was also a trend for baggy sweatpants riding low on your hip, but I didn't like the options in game for those.
For party wear this girl has gone for the asymmetric hemline in one dress at the bandaged look in one.
Kids:
For kids it's much easier in game to find several options of the t-shirt over shirt variant, for both boy sand girls. It's harder to find the trend "I try to dress like an adult" for girls which was the thing. Girls might not have had heals, but a lot of their looks were inspired by teen/young adult outfits. I've tried to do my best with the third look here.
90s fashion turned out to be much harder than I had expected. This is the time when I was a teenager, so you'd think it be easy! Instead I kept thinking that people just wore "normal clothes" and that made it so much more difficult.
So instead of my usual three posts, I'm going to settle for one joint post and instead highlight a few trends that were popular. I'll skip the kids, as most of what is in game would work, and focus on adults.
First out: Moms.
Here I've mixed what I've seen in the Sears and JC Penny catalogues with what I remember my own mother wearing. A lot of jackets with t-shirts or sweaters underneath combined with either jeans or fairly long flowing skirts. Other trends were mixing these with knitwork or oversized sweaters with bold prints, but we don't have too many of those.
Oversized clothes:
A major trend in the 90s. Here I've comprised them in three looks that works in game.
Hip Hop
This started in the 80s but was still going strong in the early 90s. This might be the only decade where I will allow the game to use the middle outfit, although likely not as I still hate the look.
Grunge:
Another huge trend was of course the grunge trend. There is an entire kit for this, but as I don't own it I've done the best with what I have, meaning a lot of the werewolf pack.
Some generic 90s outfits:
Not everyone had a distinct style. Most of us just wore "clothes" so I made a few looks for the more generic 90s-style, including a little nod to the trend my friends loved - the 70s-look!
Neon colors and fitness outfits:
Were still inspired by the 80s, but now aerobics were in fashion. Neon colors were still popular but now on black background. I even had a sofa with neon patterns on a black fabric in my room, but not so many clothes as I remember. Maybe in the early 90s.
ME!
Finally, something I had great fun with. Making my teenage self. This, is a very good representation of what I wore, with the very tight, formfitting jeans being a staple. I had more fun with these outfits than with any other, I think I even got the hair, jewelry and make-up fairly accurate to what I looked like. Note that my work-out wear looked nothing like the trend, but in gym class, oversized t-shirt and bicycle shorts was what everyone was wearing.
For infants, the 1980s meant a return to the division of girls and boys, while the clothing items themselves pretty much stayed the same as they were during the 1970s. Onsies were popular, as were soft track suits with large prints on. This is the decade where pink for girls and blue for boys is truly cemented, interesting in the decade that had more men wearing pink (sorry, rose) than ever. I've mixed infants girls and boys for all categories clothing.
Toddlers:
Toddlers followed the trend of infants. Soft clothes with pictures and print (often Disney) in gendered colors (though unisex options existed as well, especially in the early 80s). Dresses were making a comeback for girls, often in bright colors. Still clothes often looked similar for boys and girls, just in different colors and with different prints.
Kids:
For kids jeans and shirts of various types were very popular, but also sports wear and tracksuits. Just as with younger kids prints were common, as were neon colors but we have very little of that for children unfortunately. I've bundled up everyday day wear with summer wear for boys and girls respectively and will then look at the other categories for both genders.
Boys - everyday and summer wear:
Girls - everyday and summer wear:
Kids winter wear:
Girls and boys often had the same outfits for this category, but differed in colors and prints. The overall was practical and useful, especially for young kids.
Kids - Formal and Party wear:
Kids - work out wear and swimming:
Work out wear followed the trends for adults, though more so for boys than girls. Tight body outfits were sold in catalogues for girls, often with shorts over. For swimming bold colors and prints were popular. I liked the ones with floats so I added those too.
Kids - sleep wear:
For kids pjs were common, often matching for the entire family. Kids underwear were simple, plain white or striped or with some simple print on.
Teenagers - boys everyday, summer and winter outfits:
For teens, a lot of the trends that set the tone for adults applied, but I've chosen to focus on jeans here. This became more and more the staple for teens in the 1980s, often in very light stone washed or acid washed varieties. With jeans you could wear t-shirts (most often with prints or in bright colors), sweaters, shirts or jackets. Michael Jackson and Tom Cruise in Top Gun were style icons so I've tried to incorporate that here as well. For parties, which would mostly be at home, everyday clothes were generally worn.
Teenagers - girls everyday, summer and winter outfits:
Girls too wore a lot of the same things that adults wore, but with some unique styles. Neon colors, lots of jeans, and towards the end of the decades baggier clothes. Skirts would be shorter for teens and YAs than adult women and sneakers the most common form of shoe.
Teenagers - prom:
Getting the prom look right is hard in the sims. Again too few ruffles in game! But I tried two more classic looks here, with boys in rather traditional outfits and the girls in voluminous skirts. It's the closest I could get to the prom pictures I looked at when making these.
For the more bold teens, a shorter skirt and bolder colors on top is an option. These are a bit out of the ordinary, but still in tone with the decade. The second look is my attempt at something resembling Madonna's Like a Virgin look, something which would definitely be desirable for any girl.
Teenagers - swimming and working out:
Swim wear for teens were really just the same as adults. I added a few more options for swimsuits here, but in general anything that works for adults would also work for teens.
The same can be said for work out wear, and so I only made a few looks for each.
I chose not to make a category for sleep wear as it would be the same as for adults. For party wear the every day wear would be used, as teens were not able to go to clubs the way young adults were.
For women, the game actually gives us quite a lot to work with when it comes to the 80s. Pleated skirts, ruffled dresses, power suits... There are still items missing (the huge wedding and prom dresses, the legwarmers...hairstyles, and again, hairstyles!), but we do have options for most categories.
Everyday:
Let's start with the power suits. With women entering the work force in much larger numbers, they needed clothes that reflected that. The power suit became popular. The business chic kit actually gives us quite a bit of options (I love the leopard print on the first outfit for this decade), but there are options even in base game. That hideous career outfit for the business career actually works for the 80s.
Women also wore separates, and here I've tried to put together a few looks that might work for a working woman. The top from the Golden Years kit works well here, as the entire kit has a very 80s feel to it. For the third outfit I wanted to represent the more lively color palate during the decade. The second to last outfit is a representative of a more casual style, as jeans became more popular for adults as well as teens. The last outfit I just adore. Perfect for the 80s.
Another trend was the long flowing skirts, often pleated, that could be worn with basically anything. I have made three outfits I think work well with the decade in mind.
Pants were also becoming increasingly common for women to wear, especially the balloon pant which we still don't have a really good option for in game. Jeans became more common too.
For the younger adults, and especially towards the end of the decade, a more casual style works. The oversized clothing became more and more common and stayed into the early nineties (all these looks would work for 90-92 as well).
Winter wear:
Winter wear was harder for women than for men. There are a few coats and jackets that work well (I love the new addition we got to base game for both men and women), but I managed some looks that I think work. The last two are a representative of the skiing fashion of the time.
Summer wear:
For summer it was so much easier, and here it was almost more an issue about not going overboard (which I might have anyway). The key word here would be pastels, navy and stripes. Horisontal blue stripes were especially popular, and featured in every single Sears, Montgomery Ward and JC Penny summer catalogue from 1980-1989 in different variations.
Other trends were pastells, tone on tone matching, fairly loose fitting dresses, and A-line skirts in various varieties. The pleated long skirt was popular for summer too, and the jackets with shoulder pads were represented too, especially in lighter or more colorful varieties.
Finally I made some outfits with shorts as that too was popular, especially for leisure activities.
Swimwear:
For swimming there were a rather large variety of styles, from the tiny bikini, to the loosefitting bathing suit here represented in the third version. With or without straps this was a popular shape, though usually with prints and in blue, this was the closest I could get to the shape, so the color had to be the compromise.
Work out wear:
Just as with men, track suits in bright colors was very popular, as were shorts and different forms of t-shirts or sweaters.
But of course what most of us think of in terms of work out wear is the leotards with legwarmers. We don't have any legwarmers in game, but I found a pair of socks that can sort of represent them. Now if anyone can explain exactly why people in the 80s decided underwear outside their leggings were a good idea...
Formal and Party wear:
One of the hardest parts in making 80s outfits was the lack of appropriate formal wear, especially the full bodied ruffled dresses. Luckily the decade had quite the variety and if you think less prom/wedding and more fancy dining, it gets easier to find options. I really like the black and gold in picture three.
For just a little less formal occasions you can get quite creative, as styles varied greatly. The black gold belted dress is perfectly 80s.
For party wear, you can do almost anything, especially if you think night club rather than at home birthday party, a situation where no rules applied. You could wear modest fancy dresses or suits, or come in a sparkly bikini. Anything was allowed. So while I absolutely adore the pink and black dress here, it's almost more fun with the outfits you get to make from separates.
Sleepwear:
Underwear was another thing that started to vary more during this decades. You had the soft bras of the 70s next to the sculptured bras that allowed for all those strapless tops, as well as corsets with stockings.
Nightgowns could be short and sexy or long and warm, depending on your style. Matching Pjs for the entire family was also still a thing.
But just as with men, silkier and fancier robes were also in style, on tv at least often combined with high healed morning slippers (so practical and just what I am dying to wear when I get out of bed, right?)
1980s was much harder to do than I thought it would. On the one hand, this is a decade I lived, on the other that mostly mean I have a good sense of what children wore. It is a decade with a lot of experimentation of fashion, bold statements and prints, and yet oddly prim and modest at the same time. The game offers quite a bit of options here, but at the same time some key components are still missing. Hairstyles, legwarmers, shoulder pads, balloon pants, neon colors and tone on tone tops and bottoms are on my wish list for an 80s kit. But here are my attempts at 80s fashion. Let's start with the men.
Everyday:
For most men suits were (still) the main item of clothing. In the 80s the three piece suit made a comeback, and the 40s styles were a huge influence. Still there were developments. Colors were bolder, brighter and it wasn't always a shirt underneath the jacket, sweaters and even t-shirts could be worn too.
For more casual fashion, an oversized shirt and balloon pants were staples (the first look is the closest we have in game), but also sweaters with prints, jean on jeans and checkered shirts.
Another trend was music. More than ever before, other than possibly the 70s, music influenced the style. I've chosen to illustrate this through some hip-hop-inspired and rock-inspired outfits.
Winterwear:
Like previous decades coats were popular in the 80s too, especially among the suits-crowd.
But jackets were common too and I've compiled a few looks that might work. I actually like the new jacket from the golden years kit for this. The jacket is exactly the right shape.
Another trend was ski-wear, and Sears-catalogues are filled with smiling people showing off their matching ski-wear for the entire family. These two looks from Snowy Escape are the best representations I could find, although its hard to find something that fits just right for the time.
Summer wear:
For summer, the polo-shirt kept much of its dominance, but the high socks were at last on their way out the door. A new trend was no socks at all, even in shoes that weren't sandals.
Shows like Miami Vice was a huge influence om summer fashion. Pastel colors, lots of pink and white and t-shirts instead of shirts.
For more casual street-wear, jean shorts were popular, as was the crop-top, or sports wear for ordinary clothes.
Swimwear:
New in swimwear was the speedo, but ordinary swim shorts were still common. Colors ranged from black, navy blue to bright neon.
Work out wear:
For sports the track suit was incredibly popular, often tone on tone matching top and bottom. Shorts could also be used, and later in the decade the hip hop fashion borrowed heavily from the sports wear - and influenced it in return. The weirdest trend of the decade has to be the shorts on track pants trend, which for some reason I will never ever understand was a huge trend! (Sears catalogue actually sold pieces with the distinct purpose of wearing them together - like why?). I think I bought the golden years package ONLY for this one look, and anything else in this pack was a bonus.
Formal and party wear:
For formal wear tails were back in style! At least for a brief period in the early parts of the decade. Still, for most formal events a tux or a suit would be worn.
For less formal parties, and night clubs, sports jackets without a tie, or shirts were quite common. Bold prints and buttoned up shirts were common according to the multitude of photos from clubs I've spent hours looking at.
Sleep wear:
Once at home and out of the party wear, the y-front was the newest in underwear. Worn with a t-shirt, a tank-top or even with no top. Boxers with matching shirt were still a thing as was pjs and robes. New materials were sneaking in, with silk or satin robes in black or bold prints being more common than before.