EU 22 (13 cm): US Toddlers' 5-5.5 (5.1 inches) EU 23 (14 cm): US Toddlers' 6-6.5 (5.5 inches) EU 24 (15 cm): US Toddlers' 7-7.5 (5.9 inches) EU 25-26 (16 cm): US Toddlers' 8-8.5 (6.3 inches) EU 27 (17 cm): US Toddlers' 9-9.5 (6.7 inches) EU 28-29 (18 cm): US Toddlers' 10-10.5 (7.1 inches) EU 30 (19 cm): US Kids' 11-11.5 (7.5 inches) EU 31-32 (20 cm): US Kids' 12-12.5 (7.9 inches) EU 33-34 (21 cm): US Kids' 13-1 (8.3 inches) EU 35 (22 cm): US Kids' 1.5-2.5 (8.7 inches)