How old are sims...really?

In real life, I have always seen teens that seem to be in the same height as their parents (maybe that is a irish thing since my little village tend to have tall children which is no surprise)

I don't mind teen heights. I never really seen any of my friends reach their parents' height until we were about 15-16. xD

I view the toddlers as 2-3, the children as 7-10, teens as 16-18, YA's as 20-early 30s, Adults as (very) late 30s - 55, and Elders as 65+

Well. For me toddlers are around 3-4, children from 6-12 or 13, then teens take over, YAs are 18 to 30 (32 tops), adult 30 to whatever is old. 60-70 maybe? Then elders take over. In the middle of the adult stage, my Sims get some aging changes, grey hairs and other follicles and maybe bit more wrinkles.

I kind of view them as all ages. I’ll dress kids up fairly young when they first age up representing 5-8 then dress them older and change hair half way through their lifespan so they are 9-12.

Teens I do the same dressing them younger to kind of represent innocent 13-15 year old and then change them up halfway through to represent 16-18

Same with YA...only I imagine it to be 21-35(ish)

The adult 38-55

Elders I keep their hair their natural colour and then switch it out for grey towards the end of their life representing 65+

I tend to view toddlers as being 3-4, kids around 10, teens 16-17, young adults in their 20s adults in their 30s-40s, and elders as 65+.

toddlers = 2-4
children = 8-12
teens = 14-18
young adults = 20-35
adults = 35-55
elders = 65+

I don't know... But I guess it's somewhere along the lines of...
Toddlers as 3-4
Kids 9-12
Teens 15-18
Young adults in 20s
Adults in Late 30s to 50s
Elders over 65

The toddlers can barely walk, and can't yet talk. I see them as 1.5-4
The children could be short for their age, or they could be tall for their age. I see them as 6-12 year olds.
The teens remind me of 14-18 year olds.
Young adults are 18-30
Adults are maybe 30-50
Elders are about 75.

I really feel sorry for adults, going from 50 to 75 overnight. It must be quite a shock. The game really needs an additional stage between adult and elder. Perhaps a mature adult?

Here we go

Baby: Newborn to a year old.
Toddler 2-5
child 6-12
Teenager 13-19 (I say it depends when puberty starts to when you're legally able to things on your own.)
Young Adult 20-29 your college years, and you're trying to figure your life out.
Adult 30-64 you're stable you have most of your life together.
Elder 65+ near or at retirement you're at the point where you just raise your glass, and have no filter.