Can a baby sleep with a blanket?
Short answer: Yes, if it is lightweight and firmly tucked in no higher than the shoulders, with your baby in the feet-to-foot position. One blanket folded double counts as two.
Here is the detail behind that answer, taken from current UK guidance from the NHS and the Lullaby Trust.
Things to check
- Match the sheet size to the mattress (for example 120 x 60cm or 140 x 70cm).
- Fitted sheets should sit tight and flat, with no loose fabric.
- Buy at least two or three for night-time changes.
What the guidance says
- If you use sheets and blankets, tuck them in firmly no higher than shoulder height. One blanket doubled over counts as two.
- Always place your baby on their back to sleep, in the feet-to-foot position (feet at the bottom of the cot, Moses basket or pram).
Related questions
What is a cot sheet?
A fitted sheet sized to the cot mattress.
Shop at Baby Kingdom
- Cot Bed Sheets - 2 Pack
- Snurk Furry Friends Flat Cot Sheet 150 x 120 cm
- Bedside Crib Fitted Sheets 2pk
- CoZee Go Waterproof Fitted Sheet - White
Check each product page for its exact dimensions, mattress size, age and weight limits and safety standards.
More advice
Are cot bedding sets with quilts safe?How many cot sheets do I need?Should I put a sleeping bag on my newborn?How do I choose a baby sleeping bag?Safe swaddling: what UK guidance saysGuide to baby bedding: what to look forAll baby bedding and sleeping bags advice →
Sources
- The Lullaby Trust: Baby mattresses and bedding (accessed 2026-10-21)
- NHS: Sudden infant death syndrome (SIDS) (accessed 2026-10-21)
General information only, not medical advice. Always follow your product's instructions. If you are worried about your baby, contact your GP, health visitor or 111. In an emergency, call 999.