Cot sheets buying guide for UK parents
Short answer: A cot sheet is a fitted sheet sized to the cot mattress. Choose one that fits your space and your baby's stage, and use it as the instructions say.
What is a cot sheet?
A fitted sheet sized to the cot mattress. It is used from birth.
How to choose
- 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.
Common questions
- Can a baby sleep with a blanket?
- How many cot sheets do I need?
- What bedding does a baby need?
- Are cot bedding sets with quilts safe?
- What size sheet fits a cot bed?
- How do I choose a cot sheet?
- How long can you use a cot sheet?
- When should I buy a cot sheet?
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.
- If you use sheets and blankets, tuck them in firmly no higher than shoulder height. One blanket doubled over counts as two.
Shop at Baby Kingdom
- Cloud Bedside Crib + 2 White Crib Fitted Sheets Bundle - Oatmeal
- Cot Bed Fitted Sheets 2pk
- Cot Bed Fitted Sheets 2pk
- Bedside Crib Fitted Sheets 2pk
Check each product page for its exact dimensions, mattress size, age and weight limits and safety standards.
More advice
How warm should a baby's room be at night?Can I buy a second-hand cot sheet?Can my baby sleep in just a vest and sleepsuit?Can I swaddle a 9 month old?How long can you use a cot sheet?Is a weighted sleeping bag safe?All baby bedding and sleeping bags advice →
Sources
- The Lullaby Trust: Safer sleep advice (accessed 2026-10-21)
- The Lullaby Trust: Baby mattresses and bedding (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.