Can I buy a second-hand cot bed?
Short answer: Check it is complete, undamaged, comes with instructions and meets the relevant British Standard. For mattresses, the Lullaby Trust recommends a new one for each baby where possible.
- 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
- The Lullaby Trust recommends a new mattress for each baby where possible. A second-hand one should have a 100% waterproof cover, no rips, tears or water damage, no sagging, a good fit and a fire-resistant label.
- 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.
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Check each product page for its exact dimensions, mattress size, age and weight limits and safety standards.
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Sources
- 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.