Cot beds buying guide for UK parents
Short answer: A cot bed is a cot with removable sides and ends that converts into a toddler bed, most often taking a 140 x 70cm mattress. Choose one that fits your space and your baby's stage, and use it as the instructions say.
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. It is used as a cot from birth, then as a toddler bed once your child is climbing or ready for a bed.
How to choose
- 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.
Space and layout
Cot beds are longer than cots, so measure the floor space with room to walk round and to convert it later.
Safety standards
- 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.
Common questions
- Are cot bumpers safe?
- Is a cot bed worth it?
- When should I move my baby into their own room?
- Should my baby sleep on their back?
- What if my baby rolls onto their tummy in their sleep?
- Where should I put the cot in the nursery?
- How do I reduce the risk of SIDS?
- Until what age should I follow safe sleep advice?
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.
Shop at Baby Kingdom
- Nika Cot Bed - Grey Wash
- Tutti Bambini Misha Cot Bed - Sage / Golden Oak
- Obaby Orla 2 Piece Room Set - White with Natural
- Mathy By Bos Fusion Wooden Adjustable Baby Cot
Check each product page for its exact dimensions, mattress size, age and weight limits and safety standards.
More advice
What do I need for a newborn's sleep?Can a 6 week old sleep with a soft toy?Can a newborn have a cot bumper?Can an 11 month old still sleep in a Moses basket?Where should I put a travel cot in the nursery?Is a bedside crib right for you? Quick 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.