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Sizing and fit guide:

Nappy covers should fit snug around babies waist and legs. If the cover is too loose, it may cause leaks. Our covers provide plenty of stretch and flexibility, and when fitted correctly, should not leave marks on babies skin.

Booroi Nappy Cover Sizing:


Newborn Small Medium Large XL
Weight 2-5kg 3-8kg 7-14kg 12-18kg 18kg+
Waist 20-36cm 27-50cm 33-61cm 36-66cm 40cm-72cm
Leg 8-18cm 10-20cm 15-30cm 20-36cm 24-40cm
Rise 30cm 36cm 43cm 48cm 54cm

It is best to follow the measurements provided, as the weight ranges are approximate only. If you are using our covers over a fitted nappy, measure over nappy while it is on your baby, to ensure that the cover will fit the extra width at the waist etc.
Generally speaking our covers provide a generous fit, due to their adjustability and stretch. The small size fits most newborns, and will last many months after that also, usually between 6-12 months of age. The medium size can last some toddlers until toilet training. Taller/older toddlers may move onto the large and extra large sizes, but many will not need to.