S.C.
My youngest daughter was 2 when she trained, but she is quite petite. She, also, was in a 9-12 mo when she trained. I found some at target that were 12 month size... they were even in Dora, which she adored. They weren't too expensive, if I remember correctly. I think they were about $7-8 for 3. Yeah, it was more than it should have been, but it was worth it to have her out of diapers and then to not have her panties fall off of her when she wore a dress. lol
The internet is a good idea too. :o)
Good luck!
S.
(mom of 3, ages 9, 6, 3)