Recommended Age Insole Length in Inch Insole Length in CM 0-6 months 4.3” 11 cm 6-12 months 4.7” 12 cm 12-18 months 5.1” 13 cm Note:Shoe size & Age for guidance only, It is essential that you take careful measurements in order to ensure proper fit Brand New Little feet need protection. our soft and flexible pre-walker shoes slip on easily and provide a sung and secure fit without restricing movement, promoting the healthy development of tiny, growing feet.