How to Choose the Right Diaper Size for Newborns
By Naty|Certified Safe.MadeFor Skin.Built | Published: 2026-10-21
Category: Buying Guides
Learn how to select the perfect diaper size for your newborn, including weight ranges, fit checks, and why Naty's BioEmbrace Size 1 is a safe, eco-friendly choice for sensitive skin.
Quick answer
For most newborns, start with Size 1 diapers (7-14 lbs / 3.2-6.4 kg) and confirm a snug fit around the legs and waist without red marks. Naty's BioEmbrace Size 1 is a top pick for its eco-certified materials and gentle design.
Why size matters for newborn skin and comfort
A diaper that is too small can cause leaks, chafing, and pressure marks, while one that is too large may gap at the legs and lead to blowouts. Newborns grow quickly, so checking the fit every few weeks helps avoid discomfort.
Naty's BioEmbrace diapers are made from renewable plant-based materials and are free from chlorine, perfumes, and lotions, making them a gentle option for sensitive newborn skin.
How to choose the right diaper size for your newborn
- Check the weight range: Most brands list a weight range on the package. For Size 1, that's typically 7-14 lbs (3.2-6.4 kg). If your newborn is on the lower end (under 8 lbs), some parents prefer Size 0 (up to 10 lbs) for a trimmer fit. Weigh your baby weekly until they settle into a stable growth pattern.
- Perform the two-finger test: After fastening the diaper, you should be able to slide two fingers between the waistband and your baby's belly. If it's too tight, go up a size; if you can fit more than two fingers, the diaper is too loose.
- Look for leg gapping or red marks: If the leg cuffs leave deep red indentations, the diaper is too small. If there's visible space or the inner leak guards are folded inward, the diaper is too large. A proper fit means the cuffs lie flat and snug. Check the leg area after each change during the first few days.
- Observe blowout patterns: Frequent leaks up the back or out the legs often indicate a size mismatch. If your baby is between sizes, choose the larger size for better coverage, especially at night. Switch to the next size as soon as blowouts become routine.
Product facts
- 100 x BioEmbrace Diapers (size 1): Award winning eco diapers, wipes, pull on pants and more by Naty. Baby clothing line made from 100% eco certified organic cotton. Size 1 BioEmbrace diapers combine eco-friendly construction with a snug, leak-proof fit, ideal for newborns transitioning from the hospital to home.
100 x BioEmbrace Diapers (size 1)
Fit guidance
Best for
- Newborns weighing 7-14 lbs who need a snug, eco-friendly diaper for sensitive skin
- Parents seeking a plant-based, chlorine-free diaper with a reliable fit
Not for
- Babies under 7 lbs who may need a Size 0 for a better fit
- Parents who prefer disposable diapers with wetness indicators (Naty BioEmbrace does not include a wetness strip)
