Detailed Size Information: 8 M US Toddler -- Sole length -- 6.77 Inch 9 M US Toddler -- Sole length -- 7.00 Inch 10 M US Toddler -- Sole length -- 7.24 Inch 11 M US Little Kid -- Sole length -- 7.48 Inch 12 M US Little Kid -- Sole length -- 7.71 Inch 13 M US Little Kid -- Sole length -- 8.18 Inch 1 M US Little Kid -- Sole length -- 8.42 Inch 2 M US Little Kid -- Sole length -- 8.66 Inch Please refer to the size chart when select the size.