The elastic design makes it comfortable to wear. The childrens socks are premium quality cotton knitted, touch soft, breathe freely, absorb sweat, odor resistant, and keep warm. Soft, lightweight, and anti-slip soles are well-crafted to make walking feel natural. Features źHigh tube anti-drop designź The shoes wont fall no matter how you kick them, they can be worn both fat and thin źCotton wool liningź 360° terry tightly wraps babys feet, is soft and comfortable and can be worn by bare feet Product Step 1: Place the foot flat on a sheet of paper. Step 2: Draw a line at the end of the heel and a line at the end of the longest toe. Step 3: Measure the distance between the 2 lines. *If the length falls between 2 sizes, choose the larger size.