Kids Size Guide

As babies grow so quickly, it’s not surprising that new parents find themselves constantly shopping for new outfits. It can also be tricky with a wriggly baby to know which size to buy especially if your little one isn’t an ‘average’ size and often age is not the best indicator of size. Therefore, our size charts include a weight and height guide to help you select the right size. If you need to measure your baby’s feet, print out our Mothercare shoe sizing guide.

Please refer to the guide below to help you find the size that is right for your baby or child.

Baby & Toddler (boys/girls)

Age Size Weight
premature 3lbs/1.4kg
premature 4lbs/1.8kg
tiny baby 5lbs/2.3kg
new baby up to 50 cm 7.5lbs/3.4kg
up to 1m up to 56 cm 10lbs/4.5kg
1-3m up to 62 cm 14.5lbs/6.5kg
3-6m up to 68 cm 17.5lbs/8kg
6-9m up to 74 cm 20lbs/9kg
9-12m up to 80 cm
12-18m up to 86 cm
18-24cm up to 92 cm
24-36cm up to 98 cm

Clothing size guide - Kids (boys/girls)

Age Height (cm) Chest (cm) Waist (cm) Hips (cm)
3-4 years 104 57 54 60
4-5 years 110 58,5 54,5 62,25
5-6 years 116 60 55 64,5
6-7 years 122 62,25 57 67,25
7-8 years 128 64,5 59 70
8-9 years 134
9-10 years 140

Footwear Size Guide - Crawlers (Age)

Age Foot Length (mm) UK Size EU Size
6-9 months 106 2 18
9-12 months 115 3 19
12-18 months 123 4 20,5

Footwear Size Guide - First Walkers (Age)

Age Foot Length (mm) UK Size EU Size
9-12 months 106 2 18
12-18 months 115 3 19
18-24 months 123 4 20,5
24-30 months 130 5 21
30-36 months 138 6 23

Footwear Size Guide - Childrens Footwear (Age)

Age Foot Length (mm) UK Size EU Size
1 year 123 4 20,5
1 - 1.5 year 130 5 21
1.5 - 2 year 138 6 23
2.5 - 3 year 146 7 24
3.5 - 4 years 153 8 25,5
4 - 4.5 year 161 9 26,6
4.5 - 5 year 169 10 28
5.5 - 6.5 year 176 11 29
6.5 - 7.5 year 184 12 30,5
7.5 - 8 year 192 13 32
8 - 9 year 200 1 33
9 - 10 year 209 2 34