How big is a 13 year old vagina?

Answer 1

My girlfriend has Turner's Syndrome, so she's stuck with pre-puberty body parts for a lifetime. She recently had an ultrasound where they stick a stick inside her vagina. it was about as big around as my pinky. about 1cm diameter. it wouldn't go in without some angling and pushing, and when it did, it startled her.

when she's worked up sexually, I can fit my middle and ring fingers in her no problem, but if I were to add a third it would probably hurt (she doesn't want to try)

hope this helps!