I usually wear size 6 women's shoes and order 4 from Big Kids and they are a little tight to fit in the heel but otherwise perfect.
Most of my ugg boots stretch after a while, so I think when you put them on they will fit perfectly.
TIMATEGO Toddler Slip-on Sneaker Moccasin Boys' Shoes for Slippers
54 Review
π Stylish Girls Toddler Prewalker Walker Boys' Shoes for Sizes 5.5-6.5
58 Review
Scurtain Toddler Slippers Artificial Non Slip Boys' Shoes for Slippers
55 Review
Organic Cotton Booties Slippers Toddlers Boys' Shoes
59 Review
Non-Slip PIZOFF Toddler Water Shoes: Quick-Drying Aqua Socks For Beach, Swimming, And Walking Adventures!
3 Review
Hawkwell Athletic Comfortable Soccer Shoes For Kids - Suitable For Indoor And Outdoor Use, Available In Toddler, Little Kid, And Big Kid Sizes
18 Review
π Ultimate Footwear for Active Boys: Basketball Comfort Sneakers - Breathable & Non-Slip
3 Review
HOBIBEAR Lightweight Athletic Sneakers For Kids - Perfect For Running, Walking, And Sports!
10 Review