One of the most common questions we get from new cloth-diaper families is exactly this one: how do I tell that the diaper is sitting right? It's a good question — and it actually has a fairly simple answer once you know what to look for.
In this guide we go through the fit step by step. Once you've got used to checking for these signs, you'll notice the difference straight away: the diaper doesn't gape at the legs, doesn't sit too high or too low, and it lasts the hours you need without leaking.
One size — a diaper that grows with your child
Our modern cloth diapers are what's known as one-size diapers. They're made to fit from around 4 kg and grow with your child right up until the diaper period is over. You adjust the size with the snaps at the front of the diaper — a small snap that makes the cloth diaper smaller when your child is little, and that you release as your child grows.
Some children fit into one-size diapers as newborns, others need to wait a few weeks until they reach 4 kg. This is entirely individual, and the most important thing is that the diaper sits comfortably — not that it lands on an exact weight.
Something we learned ourselves the hard way, many years back when we were new cloth-diaper parents: we were so used to snapping it on the smallest setting that we completely missed adjusting it up after a few weeks when it was time. At the start you adjust upwards more often, but then you can keep the same setting for a long while before it's time to release the next snap. Worth checking now and then — the fit should feel supple, not tight.
Where should the diaper sit? — the height
A modern cloth diaper sits a little lower than a disposable. One to two centimeters below the navel is a good starting point.
If it's too high, it becomes bulky and can rub against the tummy. If it's too low, it doesn't catch things in time before something leaks.
Snap the front snaps down on the diaper if you want to make it smaller — that draws the fabric together and the diaper sits tighter around the bottom instead of sitting loose.
Four steps to a good fit
Once you've put the diaper on, go through these four points:
1. Two fingers at the waist
You should be able to fit two fingers between the diaper edge and the tummy. Any more than that and the diaper sits too loose — then it gapes and a leak is on its way. Any less and it pinches.
2. Snap all the snaps on the tabs
Both sides, all the way. This is often where new parents compromise — leaving one snap undone — and then the fit gives way after an hour or so. Snap all three snaps.
3. Push the fabric up at the front (if you've snapped it smaller)
If you've snapped the diaper to a smaller size, the fabric at the front can bunch up. Gently push it up so it lies smooth — that gives the optimal fit and stops the diaper sliding down.
4. Tuck the diaper edge into the groin
At the inside of the legs, the edge of the fabric should be tucked into the groin. That's where leaks most often come from — and a second of tucking is enough.
If the diaper leaks — the fit is rarely the culprit
The first thing many people suspect when a cloth diaper leaks is the fit. But in most cases it isn't the fit — it's too little absorbent material (insert). If needed, you can then add an extra insert to soak up more liquid. For most, a prefold insert lasts about three hours.
Use good-quality inserts and make sure they cover the whole length of the pocket. Then the fit holds together and the diaper manages the hours you expect.
Summary — checklist
- Height: 1–2 cm below the navel
- Two fingers at the waist
- All snaps on the tabs closed
- Fabric at the front pushed up if a smaller size is snapped (mainly boys, who wee at the front)
- Diaper edge tucked into the groin
- Enough absorbent insert
Once you've gone through the checklist a few times, you'll do it automatically. And then the diaper sits right — every time.
Get in touch if anything feels tricky. We're here when you need us.
— Martin & Time Ahead Sweden