Skip the Preemie Diapers: Why Most Families Only Need Newborn Size
Bringing home a baby — especially after a NICU stay — can make parents feel like they need to buy everything labeled “preemie.” But when it comes to diapers, here’s some reassuring news:
Most families do not need to spend money on preemie diapers.
In fact, the majority of babies — even many NICU graduates — fit into newborn diapers by the time they are discharged home.
Let’s break down why.
What Parents Often Don’t Realize
Hospitals and NICUs routinely use preemie-sized diapers during early hospitalization because babies are still growing and gaining weight. But babies grow quickly — especially in those final days before discharge.
By the time your baby is:
Feeding consistently
Gaining weight appropriately
Maintaining body temperature
Preparing for discharge
They are often already in the 5–8 lb range, which fits comfortably in newborn diapers.
Most newborn diapers are designed to fit babies starting at around 6 pounds — and they have flexible tabs and adjustable waistbands that allow for a snug, leak-proof fit.
Why Buying Preemie Diapers Often Wastes Money
Preemie diapers:
Fit babies under ~6 lbs
Are more expensive
Are sold in smaller quantities
Are often outgrown within days
Many families buy multiple packs during pregnancy — only to find they never open them.
If your baby does end up needing preemie size briefly, you can always purchase a small pack after discharge. But buying them in advance is usually unnecessary.
What We Recommend at NEOwell
When preparing for baby:
✔ Stock one small pack of newborn diapers
✔ Skip bulk preemie purchases
✔ Wait to see your baby’s discharge weight
Even for NICU graduates, most babies are ready for newborn size by the time they go home.
As neonatal nurse practitioners, we’ve supported countless families through discharge — and we rarely see babies go home needing ongoing preemie diapers.
A Note for NICU Families
If your baby is being discharged under 5 pounds, your care team will guide you. Some very small or medically complex infants may need preemie sizing briefly — but this is the exception, not the norm.
If you’re unsure, ask your NICU nurse or provider before purchasing.
Save Your Money for More Important Things
Save your money for what truly matters — feeding support, safe sleep setup, and postpartum recovery.
When it comes to diapers?
Newborn size is almost always the right place to start.
If you're preparing for discharge or feeling overwhelmed about what to buy, NEOwell offers personalized newborn preparation sessions and NICU discharge support for families across Arlington, Falls Church, and the DC Metro area.
We’re here to simplify the transition from hospital to home — with evidence-based guidance and real reassurance.