These are just first appearance's. You can + there ages with 3 to know how old they were in the end of the show

Very late but there’s no way scorpia’s that old when she has a crush on catra,,, she’s not a pedo

How old is hordak-

After doing some research I think the creators said that Entrapta is from late 20's to early 30's

Who knows their a lizard

Yes that one is the best

Here is what I think

Adora - 16 ish

Catra - 16 ish

Glimmer - 15

Bow - 17

Mermista - 19-20

Sea hawk - 23

Scorpia - 18-19

Perfuma - 19-20

Entrapta - 15

Frosta - 11 3/4 (we knew that)

Netossa and spinny - 21-22

Double trouble - 17 (when in his own form)

I think it was confirmed on Twitter or something that Catra and Adora were around 17-18 in Season 1, making them 20-21 by the end of season 5

Adora - 17/18

Glimmer - 16/17

Bow - 17/18

Catra - 17/18

Perfuma - 18/19

Mermista - 21/22

Scorpia - 20/23

Netossa - 25/26

Spinarella - 26/27

Frosta - 11 3/4

Sea Hawk - 20/21

And don't forget:

Madame Razz - 1080/eternal

I think Scorpia would be closer to 19-20 and Entrapta would be maybe 22-24, and Sea Hawk maybe 22-23. and maybe glimmer as 16? but the rest i definitely agree with. (and of course, Adora, Catra and Frostas ages are canon)