Premature baby clothing size guide
Standard newborn clothing, and even some clothing labelled as premature, can be far too big. That is why our carefully sized range is trusted by thousands of families.
We know shopping for a premature baby can feel overwhelming, so we are here to help.
Between Sizes? Simple rules of thumb for choosing a size
We offer several sizes, including 1.5lb–3lb, 3lb–5lb, 4lb–7lb and 5lb–8lb. Use this guide to help you choose the most suitable size before adding an item to your basket.
| If your baby is... | We recommend... | Why it helps... |
|---|---|---|
| Near the top of a weight bracket or very long | Size up | Gives them room to stretch comfortably. |
| Near the bottom of a weight bracket or petite | Size down | Keeps them snug and helps prevent loose fabric around the face. |
| Using lines, leads or requiring frequent changes | Size up | Makes dressing easier and gives extra room for medical equipment. |
Need detailed measurements? Most product pages include detailed garment measurements under Product Details. Contact us if not.
Why our size brackets work
Do our size brackets seem quite wide?
If sizes such as 3lb–5lb or 5lb–8lb seem broad, please be reassured that this is intentional. A premature baby's weight does not always reflect their body shape, length or proportions.
Most product pages also include detailed measurements under Product Details.
1. Proportions matter more than weight alone
Every baby is different. Two babies may both weigh 4lb, but one may be long and lean while the other is shorter and more compact. A broader size bracket allows the clothing to accommodate differences in length, head size and body shape without pulling or chafing.
2. Room for medical care and checks
If your baby is spending time in the NICU, their clothing may need to fit around nappies, monitors, lines and wires. A little extra room can make dressing easier and allow nurses and parents to carry out checks with less disruption.
3. Comfortable room for layers
Premature babies may wear layers, such as a vest underneath a sleepsuit, to help them stay warm. Our size brackets allow enough room for these layers without making the clothing feel restrictive.
4. Room as they grow
Premature babies can grow quickly during their early weeks. A slightly broader size range can help a favourite outfit last longer before it becomes too small.
For a premature baby, the right fit is about softness, safety and ease of dressing rather than close tailoring. An outfit may look slightly roomy at first, but it should not be so large that it swamps the baby, becomes uncomfortable or makes temperature regulation more difficult.
Shop premature baby clothes by size
MICRO PREEMIE, 1LB–3LB EARLY BABY, 3LB–5LB TINY BABY, 5LB–8LB
Still unsure?
Check the Product Details section on the item you are considering for garment measurements.
You can also contact us if you need help choosing the most suitable size or would like us to measure an item for you.