If your child wets the bed and you’re trying to work out which DryNites size to buy, you need two things: the right waist measurement and an honest answer about what to do if they’ve outgrown the range entirely. This guide covers both, without padding.
DryNites Size Guide at a Glance
DryNites (sold as Goodnites in some markets) come in two sizes for pyjama pants:
- 4–7 years: waist 48–60 cm (approximately 19–24 inches)
- 8–15 years: waist 61–85 cm (approximately 24–33 inches)
These are the manufacturer’s stated ranges. In practice, fit depends more on waist circumference than on age — a slim ten-year-old may fit the 4–7 size, while a larger seven-year-old may need the 8–15 immediately. Always measure before buying a full pack.
How to Measure Correctly
- Use a soft tape measure.
- Measure around the natural waist — roughly at the belly button, not the hips.
- Measure over underwear or light clothing, not bare skin, for a realistic fit.
- If your child is between sizes, size up rather than down. A snug waistband that gaps at the legs is a leak waiting to happen.
What the Size Difference Actually Means
The 4–7 and 8–15 sizes are not just scaled up versions of each other. The 8–15 has greater absorbent capacity, longer front-to-back coverage, and wider leg openings. For a child who wets heavily overnight, putting them in the smaller size to save money or because it “still fits the waist” frequently results in leaks — not because the product has failed, but because it was never designed for that volume or body shape.
If you’re already seeing leaks on the 8–15 size, the issue is likely not the size but the design. Why overnight pull-ups leak is a separate problem worth understanding — capacity and fit are only part of the picture.
DryNites 4–7: Who It’s Actually For
The 4–7 size suits children at the lighter end of primary school age with moderate overnight wetting. It’s widely stocked in supermarkets and pharmacies, making it the most convenient starting point for families who’ve just moved on from nappies or are dealing with occasional wet nights.
Absorbent capacity in the 4–7 is lower than the 8–15. For children who wet fully overnight — not just a small amount — this size will often not contain a full void, particularly if the child sleeps on their front or side. Sleep position plays a significant role in where and how products leak, and it’s worth factoring that in before assuming the size is wrong.
DryNites 8–15: Fit, Capacity, and Limitations
The 8–15 is designed for older, larger children and has meaningfully more absorbent material. For many families, it works well enough. For others — particularly children who wet heavily, wet more than once overnight, or sleep in positions that stress the leg cuffs — it still leaks.
This isn’t a defect. It’s a design limitation that applies across most pull-up style products. Leg cuffs compress when a child lies down, and the waistband seal that works upright often fails under the sustained pressure of lying in one position for several hours.
When the 8–15 Stops Working
Parents typically reach a tipping point with the 8–15 size for one of three reasons:
- Their child has physically grown beyond the 85 cm waist limit
- The product leaks consistently despite a correct fit
- The child wets more than the product can hold
Each of these has a different solution, and they’re worth separating out before spending money on alternatives.
What to Do When Your Child Outgrows DryNites
This is the question most size guides don’t answer properly. The DryNites range ends at approximately 85 cm waist. For children who are larger — or for teenagers who still experience nocturnal enuresis — there’s no obvious next step on the supermarket shelf. But there are real options.
Option 1: Higher-Capacity Pull-Ups
Several brands produce pull-up style products for older children and adults with higher absorbent capacity and larger waist sizing. These include products from TENA, iD, Lille Healthcare, and others. They lack the child-friendly branding of DryNites but perform well and are available in larger sizes. Many families find that moving to an adult pull-up in a small size is more effective than stretching the DryNites 8–15 beyond its limits.
Option 2: Taped Briefs (Nappy Format)
Taped all-in-one products — sometimes called nappies for older children, or continence briefs — offer the highest absorbent capacity available and the most reliable overnight seal. Brands such as Pampers Bed Mats, Tena Slip, Molicare, and Abena produce products suitable for older children and teens. They are unfairly stigmatised; when a child wets heavily and nothing else is containing it, a taped brief is often simply the most practical answer. Dignity comes from getting a good night’s sleep, not from which product makes that possible.
Option 3: Booster Pads Inside the Current Product
If the DryNites 8–15 fits well but doesn’t hold enough, adding an insert pad inside the pull-up can extend capacity without switching products entirely. This is a reasonable intermediate step, particularly if your child is close to being dry and you’re managing occasional heavy nights rather than nightly wetting.
Option 4: Bed Protection Alongside
A waterproof mattress protector and a washable bed pad beneath the child don’t replace product containment, but they significantly reduce the cost and disruption of a leak. For families managing exhaustion from night changes, layering protection so a full sheet change isn’t needed every time can make an enormous practical difference.
Children with Sensory Needs: Fit Matters Differently
For children with autism or sensory processing differences, the feel of a product often matters as much as its absorbency. DryNites are relatively soft and low-bulk, which makes them a reasonable choice for sensory-sensitive children who can tolerate them. If texture, noise, or waistband pressure is an issue, the product switch to a higher-capacity option needs to account for those factors too — not just size and capacity. Some children who manage DryNites refuse adult pull-ups because of the different elastic feel or material weight. That’s a legitimate constraint, not a preference to be reasoned away.
When Size Isn’t the Real Problem
It’s worth being honest: many families find that no matter what size or brand they use, leaks persist. This is a widespread, documented problem with pull-up style products used overnight — and it’s not always solvable by sizing correctly. Parents switching products repeatedly in search of a leak-free night often find that the underlying design constraints of pull-up products are the issue, not the specific brand or size.
Understanding where the leak is happening is the most useful diagnostic step. Front leaks, back leaks, and leg leaks each have different causes and respond to different interventions. Switching sizes arbitrarily often doesn’t help if the leak pattern points to a positional or design issue rather than a fit one.
Summary: DryNites Sizing in Practice
Measure the waist before buying. Use the 4–7 for children up to 60 cm waist; move to the 8–15 from 61 cm. If the 8–15 no longer fits — or no longer works — the DryNites range is not the end of the road. Higher-capacity pull-ups, taped briefs, and booster pads are all legitimate next steps, depending on the child’s size, wetting volume, and sensory needs.
If you’re at the point where DryNites aren’t cutting it and you’re not sure what to try next, start with the leak pattern, not the brand. That tells you more than any size chart.