When should I buy a cot bed?
Short answer: Buy in time for when you will first use it: as a cot from birth, then as a toddler bed once your child is climbing or ready for a bed. For newborn essentials, many parents order in the second trimester to allow for delivery and assembly.
- 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.
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.
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
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Check each product page for its exact dimensions, mattress size, age and weight limits and safety standards.
More advice
Until what age should I follow safe sleep advice?Can a 6 week old sleep in their own room?How long does a cot bed last?How do I choose a travel cot?Your 6 month's sleep space: a safe-sleep guideSleep position 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.