How old are sims?

Baby: 0 to 4 months
Toddler: 2-4 years
Child: 7-10 years
Teen: 16-19 years
Young Adult: 20 - 35 years
Adult: 36- 59 years
Elder: 60 and beyond

I feel like there is a big age gap between kids and teens and it's not just height but developmentally wise. My 13-year-old is taller than me but she still doesn't look like a teen in the sims 4 who look like adults. You can tell my daughter is a teenager despite her height. It's very hard to tell the difference in a sims game which is why I think they should have been a little shorter because this is a game and I would like to tell the difference between the life stages as I play them. I also feel like teens lack any individual gameplay for just them. All the life stages need work but I think teens and babies need an overhaul.

To me or at least

Babies 0-2
Toddlers 2-5 since they can talk, have a personality, walk, and watch TV/use tablet
Children 6-12 because they go to school, can enroll in after school programs, build some schools but they can't cook or do much at home alone.
Teen 13-18 because they can date, they can apply to scholarships or universities, they can go anywhere else.
Young Adult 19-35 where you can go to college or work or start your family.
Adult 36-64 because now they're getting older, wrinkles, they're told to think about settling down, a lot more whims related to careers or family.
Elder 65 where you can retire or work until your last days. No longer able to have kids.

I think toddlers depend on the game. I'd put sims 2&3 toddlers at 9 months to 2 years, whereas sims 4 are 18 months-2 years to start and their life stage ends closer to 3 or even 4.

For all games though,
baby: newborn-6 months
child: 5-12 years
teen: 13-17
young adult: 18-34
adult: 35-55
elder: I want to say 56+ but they jump to looking in their 70s?

theres obviously huge jumps between babies, toddlers, children, and teens, as well as adults and elders that bug me a bit but oh well

Baby 0-1
Toddler 2-4
Child 5-10
Teen 14-18
YA 20-35
Adult 35-65 I guess?
Elder is a tough one for me. I guess I'll go with 70+ because I don't really know too many people in their 60s who look that aged.

Babies: Newborn to a week at most nothing is offered to play them any older they go from a lifeless object to a walking toddler
Toddlers: 2-3
Children: 6-8
Teenagers: 16-18
Young Adults: 19-30
Adults: 31-40
Elders: 65-70

Have not thought about it much. By the look of the sims the game gives an impression of reaching for the consumer group of shallow teenagers, since all the sims look very young and fresh, and teen sims almost like adults, and elders act very old. I liked the teen look in TS3 better, more distinguishable as younger than YA, which is how a teenager look to an adult in real life, despite their own ego..

Baby: <1 year old, because of size and gameplay
Toddler: 3 years approximately, given their skill development
Child: 5-10 years because of school and looks
Teenager: 12 mostly; in some cases up to 17 years; they look like YA, but act younger
Young Adult: 18 (legal adult age) -30 years or older; because it's the sim age where all gameplay is accessible, and looks
Adult: ca 35-55 years; few things change in their looks from YA stage, some gravitational drop and wrinkles, but nothing happens in gameplay
Elder: >75 years; their idles make them seem very old although they look so fresh

Babies: 0-2 months (they only lie on their backs so can't be any older than that)
Toddlers: 1-3 (they learn to walk, talk, eat by themselves)
Children: 6-11 (they go to school, so they can't be any younger than that, also they can't be any older based on the way their body looks)
Teenagers: 12-18 (some teenagers really are that tall at 12, so I go with 12. But based on their behaviour I'd say they are about 15-18)
Young Adults: 19-39 (some people still look youngish in their late thirties)
Adults: 40-64 (not so young looking but not quite old yet)
Elders: 65+ (wrinkles, grey hairs can't be hidden and disguised anymore)

Despite how old they may 'look' teens are the age span from thirteen to nineteen. Turning twenty frees you from being a 'teen'. Besides all of that, the Avon Lady thought I was sixteen when I was only thirteen at the time. The ironic twist is when the very same woman saw me three years later and thought I was only thirteen, when she suggested to my mother it may be a few more years before I was ready for her product. LOL Mom and I laughed. I was sixteen. I only grew one-half of an inch in high school. I'm still on the 'short' side.

In my game:
Babies: 0-12 months
Toddlers: 12 months to 4 years (the very act of learning how to walk makes them called toddlers. Some older than two aren't all that sure-footed, either, so they're classified as Toddlers through age 4. and some learn how to walk later than others.)
Children: Hahaha, 5 to 12 years (yes, they are very tall for their ages, or very short for Middle Schoolers)
Teens: 13-17 (with a codicil. Here in the USA kids become officially 'adults' at age18 able to sign contracts, marry, etc.)
YAs: 18-35
Adults: 36-55
Elders: 65- till death us do part

Coming to you with tongue-in-cheek, whilst sitting in my not-so-comfy desk chair.

This is interesting some people are really different, I do;

Toddlers - 0 to 4
Children - 5 to 12
Teenagers - 13 to 17
Young adult - 18 to 39
Adult - 40 to 59
Elders - 60

@Cinebar No signs of aging? They're mostly stooped over, have a full head of gray hair and have all kinds of aches and pains. LOL I'm coming up 66 this next birthday and I don't have a full head of grey, not even white as its going. Still retain much of the red. :)