11.5 cm — recommended for babies with a foot length of 10–11 cm; recommended age: 5–9 months; 12.5 cm — recommended for babies with a foot length of 11–12 cm; recommended age: 9–14 months; 13.5 cm — recommended for babies with a foot length of 12–13 cm; recommended age: 14–20 months; 14.5 cm — recommended for babies with a foot length of 13–14 cm; recommended age: 20–26 months; 15.5 cm — recommended for babies with a foot length of 14–15 cm; recommended age: 26–30 months.