Size 4 Nappies Size Guide

Weight bracket: 9-14kg / 20-31lbs

Nappies size guide
Size123456
Weight2-5 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

months

2-6
months
3-9
months
6-18
months
18+
months
24+
months
Average
nappies 
per day
8-1086655

What age are size 4 nappies for?

Our size 4 nappies are designed for babies weighing between 9-14kg (20-31lbs), which is typically from around 6 months to 18 months old. Of course, every baby is different, and some may need size 4 nappies a little sooner, while others might stay in them for longer.

If you're looking for the best eco nappy that’s gentle on your little one’s skin and planet-conscious, our eco nappies are a brilliant choice. Made with sustainable materials, they’re hypoallergenic, biodegradable, and designed to give up to 12 hours of leak protection - making them perfect for keeping your baby comfy and dry as they grow and begin to explore the world.

How do you know when to go to size 4 nappies? 

If you’re wondering whether it’s time to move up to size 4 nappies, there are a few signs that your baby’s size 3 nappies may be getting too small. You might start to notice red marks around the waist or thighs, or your baby might be leaking more frequently - especially overnight, if they’re starting to sleep for longer stretches!

Switching to a bigger size can help your baby stay comfortable and dry, especially as they start moving more and becoming more active. Kit & Kin size 4 nappies will give you a flexible, secure fit, whilst making sure your little one has plenty of freedom to roll, crawl, and explore. For more information on finding the fit that’s right for your baby, have a read of our ultimate nappy size guide.

Shop size 4 nappies

Can I get an eco nappy subscription? 

Get 20% off every order of our plant-based, super-soft hypoallergenic nappies - plus extra savings on hypoallergenic wipes and nappy sacks. Enjoy free delivery and all the flexibility you need to swap sizes, change delivery dates, or cancel anytime.

Subscribe now