My daughter just turned 3 and has always been a bit smaller when it comes to clothes so I bought her 2T. This dress is much prettier in real life, like in these photos don't convey it properly. I would advise buying what clothing they are currently wearing when choosing a size.
Rainbow Toddler Princess Sleeveless Sundress Girls' Clothing and Dresses
57 Review
Fancy Girls Communion Dresses White Girls' Clothing in Dresses
53 Review
UNACOO 2 Pack Sleeveless Cotton Dresses Girls' Clothing
62 Review
Castle Fairy Pageant Wedding Communion Girls' Clothing for Dresses
53 Review