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Our universal size chart covers children's sizes 1 to 6 and gives a general idea of sizing. 
As some styles may run larger or smaller, please read specific sizing information on the product listing or chat with us. You can also email hello@willoughbykids.com.

Metric 

Size Age Weight Height
Size 1 12 - 18 Months 11.1 - 12.5 kg 76 - 85 cm
Size 2 18 - 24 Months 13.2 - 14.1 kg 86 - 93 cm
Size 3 2 - 3 Years 14.1 - 15.4 kg 94 - 98 cm
Size 4 3 - 4 Years 15.4 - 17 kg 99 - 105 cm
Size 5 4 - 5 Years 17 - 19.1 kg 106 - 112 cm
Size 6 5 - 6 Years 19.1 - 21.2 kg 113–119 cm

 

Imperial

Size Age Weight Height
Size 1 12 - 18 Months 24.7 - 27.6 lbs 29.9 - 31.9 in
Size 2 18 - 24 Months 29.1 - 31 lbs 34.6- 36.6 in
Size 3 2 - 3 Years 31.1 - 33.1 lbs 36.7 - 38.6 in
Size 4 3 - 4 Years 33.2 - 37.5 lbs 38.7 - 41.3 in
Size 5 4 - 5 Years 37.6 - 42 lbs 41.4 - 44.1 in
Size 6 5 - 6 Years 42.1 - 46.7 lbs 44.5 - 46.9 in