Diaper size chart: which size by your baby’s weight
Diaper sizes go by your baby’s weight, not age — so the quickest way to pick is to check the weight range on the pack. Here’s a general guide, plus the signs it’s time to size up.
General size-by-weight guide
| Size | Typical weight |
|---|---|
| Newborn (NB) | up to ~4–5 kg |
| Small (S / 1) | ~4–8 kg |
| Medium (M / 2) | ~6–11 kg |
| Large (L / 3) | ~9–14 kg |
| XL / XXL | ~12 kg and up |
Ranges overlap and vary a little by brand — always check the weight printed on the pack.
Signs it’s time to size up
- Red marks around the waist or thighs from a tight fit.
- Frequent leaks even when changed on time.
- The tabs barely reach, or the diaper sits low.
Frequently asked questions
Should I pick diapers by age or weight?
By weight — the weight range on the pack is what matters, since babies of the same age vary a lot. Age is only a rough hint.
When should I move up a diaper size?
When you see red marks, frequent leaks, or the tabs barely reaching — those mean the current size is getting tight.
Related
Browse diapers on Qamru
Verified providers, prices agreed up front, delivered or done across Karachi.
Browse diapers on QamruRates and figures here are a rough guide only — they vary widely, so always confirm with the provider. Qamru is a marketplace by Qamru Technologies LLC serving Karachi; your payment is held and released to the provider only after you confirm the job is done.