How many cot sheets do I need?
Short answer: Most parents find two or three fitted sheets per bed covers night-time changes and washing. Match the size to your mattress.
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
- The Lullaby Trust says a baby needs just two items in their cot: a firm, flat, waterproof mattress and lightweight bedding.
Related questions
What is a cot sheet?
A fitted sheet sized to the cot mattress.
Shop at Baby Kingdom
- Muslin Fitted Sheet 140cm x 70cm - Berry Stripe
- Bedside Crib Fitted Sheets 2pk
- Cot Fitted Sheets 2pk
- Cot Bed Fitted Sheets 2pk
Check each product page for its exact dimensions, mattress size, age and weight limits and safety standards.
More advice
Is 22C OK for a baby's room?Can my baby sleep in just a vest and sleepsuit?Can I swaddle a 5 month old?Safe swaddling: what UK guidance saysCot sheets buying guide for UK parentsBaby sleeping bags buying guide for UK parentsAll baby bedding and sleeping bags advice →
Sources
- The Lullaby Trust: Safer sleep advice (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.