We are looking at starting potty learning when H is two. She is very interested in the potty, loves sitting on her seat, and has pooped in the potty once. However, she's very petite for her age (32" tall, 24 lbs., wears 18 month pants) and I'm worried that the 2T/3T panties I see at Target/Gymboree/Old Navy are going to be too big for her. Is there anywhere that sells smaller sizes?