Diapers That Don't Leak - The Guide to a Fit That Stays Dry

Diapers That Don't Leak - The Guide to a Fit That Stays Dry

Wet shirts, soaked sheets, yet another load of laundry. Leaks are usually caused by size or fit, not the diaper. The good news: it can almost always be fixed in five minutes.

The quick check that stops leaks

  • Fluff out the leak guards, the elastic around the legs should be folded outward, not tucked in
  • High at the back, pull the diaper up a little extra at the back so it sits high on the waist
  • The two-finger rule, roughly two fingers of room at the waist means snug without gaping
  • Leaking at the back, between the legs, or at night? That's the classic sign it's time for the next size up

Good to know about our sizes

Bammies diapers run slightly larger than many other brands. If your child is between two sizes, we recommend the smaller size in pants and the larger size in taped diapers. Weight ranges are always a guideline, children are built differently around the tummy, legs, and back, and sometimes another style fits better. The size guide will take you a good part of the way.

Our fit guarantee

We'll help you until the fit is just right. If you experience leaks or fit issues, we'll send free samples in a different size, just email us your child's weight, age, and which size you've tried. For quality issues, we offer a free replacement. The goal is simple: a diaper that fits the way it should and stays leak-free, day and night.

New to us? Start with a single pack or a trial kit and try the fit first.

Sample Kit Open Diapers – 3 st

Sample Kit Open Diapers – 3 st

€0,95

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Open Diapers – Single Pack

Open Diapers – Single Pack

€15,95

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Open Diapers – Monthly Box

Open Diapers – Monthly Box

€69,95

Shop now

Frequently asked questions

Why does the diaper leak at night?

Almost always the wrong size or the wrong fit — not the wrong diaper. Too small = too little capacity, too big = gaps at the legs. Try going up a size for the night.

Poop leaking up the back — what do I do?

The classic. Check that the diaper sits high enough at the back and that the waistband is snug against the skin. If it happens often, your little one has probably outgrown the size.

How do I know the diaper fits right?

The waistband should sit at waist height without being tight, and the leg cuffs should rest snugly against the skin without leaving red marks. You should be able to fit two fingers inside the waistband.

When is it time to change size?

When you see red marks around the legs or waist, when the diaper leaks upwards, or when it feels hard to close. Leaks are more often down to the wrong size than the wrong diaper.

What do I do if my child is between two sizes?

Our diapers run slightly larger than many other brands. If your child is between two sizes, we recommend the smaller size in pant diapers and the larger size in open diapers. If your child is growing fast, the larger size is usually the right choice in open diapers, and with a subscription you can change size at any time.

Can I try before I buy a whole pack?

Yes, we have sample kits with 3 diapers in several sizes, both open diapers and pant diapers. A smart start if you're unsure about size or fit.