Toshi headwear fit and sizing is variable and dependent on several factors including stretch component, knit tension and varying fabric construction. The following is an approximate sizing suggestion, for optimum fit headwear is best tried on.
XXS 37cm premmy - newborn
XS 43cm up to eight months
S 52cm eight months - two years
M 54cm 2 years - small grown up
L 56cm big kids grown up
XL 58cm bigger kids - bigger grown up