What mattress does a bedside crib need?
Short answer: 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. Use the size your frame lists.
- Check it is made to BS EN 1130:2019.
- Make sure the fixing straps suit your bed frame and leave no gap between the crib and your mattress.
- Check the maximum weight and stage limits in the instructions.
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.
- The Lullaby Trust says your baby's head should sink no more than a few millimetres into the mattress.
- 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 bedside crib?
A small crib with a drop-down or removable side that attaches safely to your bed, so your baby has their own separate sleep space beside you.
Shop at Baby Kingdom
Check each product page for its exact dimensions, mattress size, age and weight limits and safety standards.
More advice
Can I buy a second-hand Moses basket?Travel cot buying checklistWhat cots & cot beds does Baby Kingdom sell?Can a 15 month old sleep in their own room?Which cot bed suits your nursery?Your 11 month's sleep space: a safe-sleep guideAll safe sleep and sleep spaces advice →
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.