How do I choose a cot bed?
Short answer: Start with safety and fit, then practicalities. Check the mattress size listed for the frame. 140 x 70cm is common, but not universal. Keep every conversion panel, bolt and instruction sheet for the toddler-bed stage.
- Check the mattress size listed for the frame. 140 x 70cm is common, but not universal.
- Keep every conversion panel, bolt and instruction sheet for the toddler-bed stage.
- Look at adjustable base heights, teething rails and any matching furniture.
Cot beds are longer than cots, so measure the floor space with room to walk round and to convert it later.
What the guidance says
- Use a firm, flat, waterproof mattress in good condition, with no raised or cushioned edges, that fits the cot or Moses basket with no gaps.
- Keep the cot clear: no pillows, duvets, cot bumpers, loose blankets, soft toys, pods, nests, wedges or anything to keep your baby in place.
- Place the cot away from radiators, direct sunlight and blind cords.
- Cots and travel cots: look for BS EN 716-1:2017.
- Mattresses: look for BS 7177:2008+A1:2011, and BS EN 16890:2017+A1:2021 for cot, travel cot and crib mattresses.
Related questions
What is a cot bed?
A cot with removable sides and ends that converts into a toddler bed, most often taking a 140 x 70cm mattress.
Shop at Baby Kingdom
- Nika Cot Bed - Oak
- Astrid Mini Cot Bed - Satin
- Mathy By Bos Fusion Wooden Adjustable Baby Cot
- Grace Inspire Cot Bed - Little Prince
Check each product page for its exact dimensions, mattress size, age and weight limits and safety standards.
More advice
Can a 7 month old sleep on their tummy?Can a 10 month old sleep in a travel cot?Night-time temperature quizCan an 18 month old sleep in a cot bed?Grandparents' safe sleep quizCo-sleeping and sofa safety quizAll safe sleep and sleep spaces 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.