If you’re searching for what size nappy an older child needs, you’ve probably already discovered that most sizing guides stop at toddlers. The information gap is frustrating — and unhelpful. This guide covers practical sizing for children aged 4 and upward, including pull-ups, taped briefs, and specialist continence products, so you can find something that actually fits.
## Why Sizing for Older Children Is More Complicated
Children’s nappy sizing has historically been designed around potty training, which means most mainstream products top out at around 18–20 kg. For children who are larger, older, or simply not yet dry at night, the standard sizing charts are next to useless.
The challenge is that weight alone doesn’t determine fit. Hip width, waist circumference, and thigh girth all affect how well a product seals — and for overnight use, a poor fit is the most common cause of leaks. A child who is tall and slim may need a different size than a child of identical weight who carries more weight around the hips.
For children with additional needs, including autism or sensory processing differences, fit matters even more: a product that gaps, bunches, or pulls at the wrong point may simply be refused regardless of its absorbency.
## Product Types and What Sizing Looks Like for Each
### Pull-Ups (Training Pants Style)
Pull-ups are the most familiar format for older children and the easiest to introduce. The most widely available options in the UK include:
– **[DryNites Pyjama Pants](https://www.sleepsecurenights.com/category/products/drynites/):** Available in 4–7 years (15–30 kg) and 8–15 years (27–57 kg). These are the most commonly purchased starting point and are stocked in most supermarkets and pharmacies.
– **Lille Healthcare SupremFit Pull-Up:** Available in sizes from S to XL, covering waist measurements from approximately 60 cm to 150 cm — suitable for older teenagers and adults.
– **[TENA Pants](https://www.sleepsecurenights.com/tena-washable-bed-sheet-review-and-comparison/):** Designed for adults but available in sizes that work for larger teenagers. TENA Pants Plus and TENA Pants Maxi offer higher absorbency than most children’s products.
– **[Abena Pants](https://www.sleepsecurenights.com/abena-abri-let-anatomical-shaped-booster-reviewed/):** A well-regarded specialist brand offering pull-up style products in multiple absorbency levels and sizes including S, M, L, and XL.
The sizing approach for pull-ups is usually based on hip/waist measurement rather than weight alone. If your child is between sizes, go larger — a slightly loose fit is easier to manage than one that digs in or compresses the leg cuffs flat, which is one of the leading causes of leg leaks overnight. For more on that specific problem, see [What Happens to Pull-Up Leg Cuffs When a Child Lies Down](https://www.sleepsecurenights.com/what-happens-to-pull-up-leg-cuffs-when-a-child-lies-down-the-compression-problem-explained/).
### Taped Briefs (Nappy Style)
Taped products — sometimes called slip-style or all-in-one briefs — offer a closer, more adjustable fit and typically higher absorbency. They are often stigmatized but are an appropriate choice when they work better than pull-ups, especially for heavier wetters or children who leak through pull-up formats.
– **[Pampers Nappy Pants / Pampers Baby Dry](https://www.sleepsecurenights.com/pampers-for-older-children-sizing-up-and-what-to-expect/):** The largest standard size (Size 7) fits children from approximately 15 kg upward, but the fit is optimized for toddlers and may be too narrow for older children even at the right weight.
– **[TENA Slip](https://www.sleepsecurenights.com/attends-disposable-bed-pads-uk-sizing-and-availability/):** Available in Small through to Super Large. TENA Slip Plus and TENA Slip Maxi offer substantial overnight absorbency and are used by older children and teenagers with heavier wetting or complex needs. Size Small typically fits a hip measurement of 60–90 cm.
– **[MoliCare Slip](https://www.sleepsecurenights.com/molicare-pad-mini-booster-review/):** Similar range to TENA Slip. Available in Mini, Small, Medium, Large, and Extra Large. Their Slip Maxi range is among the highest absorbency products outside clinical settings.
– **[Abena](https://www.sleepsecurenights.com/my-child-soaks-through-abri-form-junior-what-comes-next/):** Frequently recommended in complex care. Available in sizes from XS to XL with multiple absorbency levels.
– **[Attends](https://www.sleepsecurenights.com/attends-disposable-bed-pads-uk-sizing-and-availability/):** A specialist option with similar sizing, often available on NHS prescription.
Because taped products have resizable fastening tabs, they offer more flexibility at the fit stage than pull-ups. This makes them useful for children with variable weight or body proportions.
## Sizing Guide by Age and Approximate Weight
The following is a general guide only. Fit should always be verified against the individual product’s measurements.
– **Age 4–5 (approx. 15–20 kg):** DryNites 4–7, Pampers Size 6–7, or equivalent pull-up. If weight is at the upper end, check hip measurement against DryNites 8–15.
– **Age 6–8 (approx. 20–30 kg):** DryNites 4–7 or 8–15 depending on build. For higher absorbency, TENA Slip Small or MoliCare Slip Small.
– **Age 9–11 (approx. 28–45 kg):** DryNites 8–15. For heavier wetting, TENA Pants Plus in Small or TENA Slip Small. Check hip measurement — this group is most likely to fall between mainstream and specialist sizing.
– **Age 12–15 (approx. 40–60 kg):** DryNites 8–15 at the lighter end; TENA Pants or Abena Pants S/M for most. TENA Slip Small to Medium for taped options.
– **Age 16–18 (approx. 55–80 kg):** Adult products in Small or Medium. MoliCare Slip Medium, TENA Slip Medium, or equivalent.
Weight ranges are approximate and based on typical growth charts. Children with complex needs, [physical disabilities](https://www.sleepsecurenights.com/category/special-needs/physical-disabilities/), or atypical body composition may require professional assessment. A continence nurse or paediatric continence adviser can provide specific product recommendations and, in some cases, access NHS-funded supply.
## How to Measure for the Right Fit
Take three measurements before ordering:
1. **Waist:** At the natural waistline, with the tape snug but not tight.
2. **Hips:** At the widest point, usually level with the top of the thighs.
3. **Thigh circumference:** At the fullest point of the upper thigh. This is important for leg-cuff fit.
Cross-reference all three against the specific product’s sizing table. Mainstream products (DryNites, TENA) publish these online. If any measurement falls into the next size up, choose the larger size — especially for overnight use where sleep movement adds strain on seals.
For ASD and sensory-sensitive children, consider requesting samples before bulk ordering. Several specialist suppliers offer sample packs, and some NHS services provide trial quantities. Material feel, noise level, and bulk are legitimate criteria — not personal preferences.
## [Booster Pads](https://www.sleepsecurenights.com/category/products/booster-pads/): Extending Capacity Without Changing Size
If you’ve found a product that fits well but isn’t absorbing enough, a booster pad inserted inside can extend capacity without size change. Widely available from specialist suppliers, booster pads add absorbency where needed most — useful for heavier overnight wetting. They don’t significantly alter external dimensions, maintaining comfort and discretion.
## When to Seek Professional Advice on Products
If your child is over five, wetting most nights, and mainstream products aren’t containing it, consult your GP for a referral to a paediatric continence service. Continence nurses can assess product needs, advise on sizing, and help access NHS-prescribed products.
If you’ve been to a clinic and support was lacking, or your GP was dismissive, see [The GP Dismissed Our Bedwetting Concern: What Parents Can Do When They Are Not Heard](https://www.sleepsecurenights.com/the-gp-dismissed-our-bedwetting-concern-what-parents-can-do-when-they-are-not-heard/) for next steps.
For developmentally typical patterns and when to investigate further, see [Bedwetting by Age: What’s Normal, What’s Not, and What to Do](https://www.sleepsecurenights.com/bedwetting-by-age-what-s-normal-what-s-not-and-what-to-do/).
## Finding the Right Product Takes Iteration — That’s Normal
No single nappy size guide will give a definitive answer on the first try. Fit varies, wetting volume differs, and sleep position affects leaks. If leaks occur in the same area, [Front Leaks vs Back Leaks vs Leg Leaks](https://www.sleepsecurenights.com/front-leaks-vs-back-leaks-vs-leg-leaks-a-guide-to-what-each-pattern-means/) explains what each pattern indicates, helping you find a targeted solution faster.
The goal is reliable overnight protection, good sleep, and a comfortable child. Whatever product achieves that — pull-up, taped brief, or mainstream with booster — is the right choice. Use the sizing info as a starting point, measure carefully, and request samples before buying full packs.