Our Baby Slipper is made with pure wool. Dyed and crocheted by hand with a extra soft sheepskin lining and tough leather soles for long lasting comfort. The Baby Slipper has the elasticity to stay put without being overly constrictive on young growing feet. Sizing Chart BABY PADRAIG NB B3 B5 B7 CAN / USA 4 3 5 7 INCHES 4 5 5.5 6 APPROX AGE 0-3mo 3 mos 1 yr 2 yrs