User blog comment:CNBA3/Bambietta and other Quincy Girls Question./@comment-24913480-20140917085827

I'd say Bambietta, Candice, Meninas and Giselle are all in their twenties (20-25 at most) and Lilotto (the "Gluton") seems to be around 13. Now, it's possible their looks doen't match their age. Maybe they can manipulate the reishi in their bodies to appear younger (or older), so at this point, it's anyone's guess.

But a characters age is something Kubo has never really bothered to mention. The only character I can remember that has stated her age is Rukia: when she first met Ichigo she said she was about 10 times older than him (which means she's about 150 years old). Maybe Kubo will eventually reveal how old every single character is in some databook.