Frequently Asked Questions

10 common questions about diaper sizing.

Q1. When should I size up?

Size up when you're in the upper 20% of the current size's weight range, when waist or thigh marks remain for more than 20 minutes, or when nighttime leaks become frequent.

Q2. Diapers keep leaking at night — is the size too small or should I switch to nighttime diapers?

If there are waist marks, size up first. If the diaper leaks at the sides or back without marks, switch to a nighttime line for higher absorbency.

Q3. Can my baby wear a regular diaper to the pool?

Most pools require swim-specific diapers. Regular diapers swell 3–5× when wet, creating a hygiene issue. Use swim diaper lines like Huggies Little Swimmers or Pampers Splashers.

Q4. When should I switch to pull-ups?

Demand for pull-ups often starts around 9–12 months when babies become more active, but for potty training purposes, pull-ups are usually introduced around 18–24 months.

Q5. Is bulk buying better than single packs?

Avoid bulk buying when a size-up is imminent. If the 'size up recommended' badge appears, hold off on large quantities. Otherwise, buying a box at a time saves 15–25% per diaper.

Q6. Why do size standards differ by brand?

Official weight ranges are similar, but waist circumference and leg opening dimensions differ by brand. When switching brands, test with a single pack in the same size before buying in bulk.

Q7. Are store-brand (Coupang Green) diapers reliable?

They have among the lowest cost per diaper domestically. Absorbency is mid-tier. A hybrid strategy — store brand for daytime, premium brand for nighttime — balances cost and performance well.

Q8. Which brand should I start with for a newborn?

Observe the brand provided by the postpartum care center for 2–3 weeks. If there's no skin reaction, continue with it. For sensitive skin, switch to a sensitive line like NatureLoveMere.

Q9. My baby has a diaper rash — what should I do?

Shorten change intervals to every 2–3 hours, rinse with water instead of wipes and dry completely, and consider switching to a sensitive-skin line. See a pediatrician if it persists.

Q10. The waist band is loose but baby's weight is in range — what's happening?

Some slender-waisted babies fit better in a size smaller than their weight suggests. Try tightening the waist tabs first, or test one size down.