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Size 3 Diapers Sizing Guide

Size 3 diapers weight bracket: 6-10kg / 13-22lbs

Size 3 already? If you feel as though you are moving through your diaper sizes at lightning speed, you will be pleased to know that size 3 usually stays around a bit longer. It’s also the size your little one will likely learn to sit unaided in. 

Diapers size guide
Size 1 2 3 4 5 6
Weight 2-5 kgs
4-11 lbs
4-8 kgs
9-18 lbs
6-10 kgs
13-22 lbs
9-14 kgs
20-31 lbs
11+ kgs
24+ lbs
14+ kgs
31+ lbs
Approx. age

up to 2


per day
8-10 8 6 6 5 5

So what age are size 3 diapers best for? It’s important to remember that diaper sizing does not depend on age. It doesn't even entirely depend on weight but rather on the specific needs of your little one.

For a general rule of thumb on age and weight brackets, have a look at our Ultimate Diaper Size & Fit Guide, where we also answer all your most burning diaper questions, such as “When to move to size 3 diapers?” and “How many size 3 diapers will I need?”. 

Perfect for these first photos of your sitting baby, Kit & Kin size 3 diapers come in our unBEARlievably beautiful bear and bunny designs. Most importantly though, they are the most accredited eco diaper on the market, so you can trust that you are doing your bit to protect the resources of the world your little one will grow up in.

Buy our size 3 diapers