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*These charts are for reference only. Fit may vary depending on the construction, materials and manufacturer. US Inches CM Infant US 2 3 7/8 10 Infant US 2.5 4 1/4 10.7 Toddler US 3.5 4 3/4 11.9 Toddler US 5 5 1/4 13.2 Toddler US 6 5 3/8 13.8 Toddler US 7 5 7/8 14.8 Toddler US 8 6 1/8 15.7 Little kid US 9.5 6 3/4 17 Little kid US 10.5 6 7/8 17.6 Little kid US 12 7 1/2 18.9 Little kid US 13 7 3/4 19.9 Little kid US 13.5 8 1/4 20.8 Big kid US 1.5 8 1/2 21.5 Big kid US? 2.5 8 7/8 22.4