Koopalings' Age Headcannons?

[merriexmas]

In your head, what are the Koopalings' ages? Here are mine:

Larry (9)
Lemmy (11)
Iggy (12)
Wendy (14)
Roy (15)
Morton (16)
Ludwig (18

 

[Sparks]

I think that's accurate. Larry is confirmed to be the youngest Koopaling.