Sleep  ·  Newborn

How to Swaddle a Newborn: Step-by-Step + When to Stop

Am I swaddling my baby safely?

Swaddling can help a newborn settle and sleep. Done right it is safe and simple. The two rules that matter most: keep it firm across the chest but loose at the hips, and stop swaddling as soon as your baby shows signs of rolling.

4 min read Sleep Updated June 2026

How to swaddle, step by step

  1. Step 1Lay the blanket flat in a diamond shape. Fold the top corner down a few inches.
  2. Step 2Place baby on their back with shoulders just below the folded edge. Head stays above the blanket.
  3. Step 3Gently straighten baby's left arm down, then bring the left side of the blanket across the chest and tuck it under the right side of the body.
  4. Step 4Bring the bottom corner up over the feet and tuck it loosely. Leave room for hips and knees to bend and move.
  5. Step 5Straighten the right arm, wrap the last corner across the chest, and tuck it snugly behind baby's back.

Get the fit right

  • Snug across the chest so it does not come loose, but you can slide 2-3 fingers between the blanket and baby's chest.
  • Loose at the hips and legs so baby can bend and kick freely. A too-tight wrap on the legs can harm hip development.
  • Always place a swaddled baby on their back to sleep, every time. Never on the side or stomach.
  • Keep the face and head uncovered, with no loose fabric near the mouth or nose.
  • Watch that baby does not get too warm. Dress in one light layer under the swaddle.

When to stop swaddling

  • Stop the first time you see any sign of rolling, often around 2 months. A swaddled baby who rolls onto the stomach cannot push back over.
  • Once you stop, do not go back to swaddling for sleep.
  • Move to a sleep sack or wearable blanket that leaves the arms free.
  • Keep following safe sleep: baby sleeps alone, on the back, on a firm flat surface. Bare crib or bassinet, no blankets, pillows, bumpers, positioners, or inclined sleepers. Firm, flat surface only.
  • Room-share, do not bed-share. Do not use car seats, swings, or loungers for routine sleep.

Call 911 now if

  • Baby stops breathing for more than 20 seconds, OR has any pause, even a short one, with a color change (blue, pale, or gray lips, face, or tongue), limpness, or no response. Brief pauses under about 10 seconds with normal color that resume on their own can be normal periodic breathing.
  • Baby's lips, face, or tongue look blue or gray, or baby is gasping or struggling hard to breathe.
  • Call 911 immediately. If baby is not breathing or not responding, begin infant CPR now. The 911 dispatcher will talk you through it.
  • Baby has a high-pitched cry with arching, stiffening, or going limp.
  • Vomit is green or yellow-green (bile), or has blood or looks like coffee grounds, or baby chokes and changes color.

Call your pediatrician right away if

  • Baby is under 3 months and has a rectal temperature of 100.4F (38C) or higher. This is urgent, call now, and if you cannot reach them go to the ER.
  • Baby's rectal temperature is low, under about 97.7F (36.4C), or baby feels cold, mottled, or is hard to warm. In a newborn this is urgent.
  • Baby seems hard to wake, very limp, or unusually fussy and cannot be comforted.
  • Breathing is fast, or you see grunting with each breath, nostrils flaring, or the skin pulling in around the ribs or neck (retractions).
  • Baby overheats in the swaddle: sweating, flushed, damp hair, or rapid breathing.
  • Skin or eyes look yellow, especially on day 1, or yellow spreading to the belly, arms, legs, palms, or soles, or with a baby who is hard to wake or feeding poorly. Call the same day.
  • Baby refuses to feed, is too sleepy to feed, or has very few wet diapers (fewer than about 6 a day after the first week, or none in 6 or more hours), dark urine, no tears, dry mouth, or a sunken soft spot.
  • Vomiting is forceful or projectile. (Small, normal spit-ups are fine, and back-sleeping is still the safest position.)
  • You found baby swaddled and on their stomach, or baby has started rolling and is still being swaddled.

Not every baby loves being swaddled, and that is okay. If yours fights it, a sleep sack works just as well.

Quick answers

How tight should a swaddle be?
Firm across the chest so it stays put, but you should be able to slip 2-3 fingers between the blanket and baby's chest. The hips and legs need to stay loose so they can bend and move freely.
When do I stop swaddling?
Stop as soon as your baby shows any sign of trying to roll, which often starts around 2 months. A swaddled baby who rolls to their stomach cannot roll back, so switch to an arms-free sleep sack.
Can I swaddle with the arms out?
Yes. Some babies settle better with arms free, and an arms-out swaddle or sleep sack is a fine choice. Keep placing baby on their back and keep the wrap clear of the face.

Sources & further reading

  1. AAP — Swaddling: Is it Safe?
  2. AAP — A Parent's Guide to Safe Sleep

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This guide reflects current AAP and CDC guidance and is for educational purposes only. It does not constitute medical advice. ParentFlow is a wellness companion — not a substitute for your pediatrician. For any medical concern, contact your healthcare provider.