Crib Mattresses Products
Explore crib and cot mattresses for nursery sleep spaces. Compare sizes, product details and retailer prices.
Nursery
Cots, cribs, mattresses and nursery furniture
Travel
Pushchairs, strollers, car seats and travel systems
Feeding
Bottles, bibs, highchairs and feeding essentials
Safety
Monitors, gates and home safety products
Browse Nursery subcategories
Choosing a cot or crib mattress
Start with the cot manufacturer’s specified mattress dimensions: a mattress that is too small can leave unsafe gaps. Choose a firm, flat, clean mattress in good condition with a waterproof cover, and follow the care instructions.
What to check before buying
- Check the exact length, width and permitted thickness.
- Look for a washable cover and clear cleaning guidance.
- Avoid adding soft mattress toppers or pillows to a baby’s sleep space.
UK guidance: For UK safer-sleep advice, see the NHS and The Lullaby Trust.
Useful resources: NHS safer sleep · The Lullaby Trust · RoSPA
This is general buying information, not a product safety certification. Always follow the manufacturer's instructions and current UK guidance.
Frequently asked questions
How firm should a baby mattress be?
It should be firm, flat and supportive, rather than soft or sagging. Follow the cot and mattress manufacturers’ guidance.
Can I use a second-hand cot mattress?
Check current NHS and The Lullaby Trust advice. A mattress must be clean, firm, flat, in good condition and fit the cot exactly; a new mattress is generally recommended where possible.
Do I need a mattress topper?
Do not add a soft topper to a baby’s mattress. Use the mattress and fitted bedding recommended for the cot.