My daughter wears a 12 (she is 6 years old) and I bought a 12.5. They fit perfectly, have enough room to grow a bit, but don't fall off.
Slip-Resistant Crib Shoes for Babies: Robeez Soft Soles for Girls and Unisex Toddlers, Ages 0-24 Months
53 Review
Flexible Comfort: pediped Flex Isabella Mary Jane for Toddlers and Little Kids
47 Review
Adorable Blowfish Malibu Play-t for Toddler and Little Girls
47 Review
Stylish and Comfortable pediped Flex Estella Mary Jane Shoes for Toddlers and Little Kids
60 Review