Each brand has a specific sizing guide. Please see the sizing guide for AMI Vellies below:
Size 3 - 13cm (12 months)
Size 4 - 13.5cm (18 months)
Size 5 - 14.5cm (24 months)
Size 6 - 15.5cm (2/3 year old)
Size 7 - 16cm (3 year old)
Size 8 - 17cm (4 year old)
*It is quite a generous fit (NOT snug) with lots of space in the width and at the toe part.