Baby Kingdom
Cot Mattresses
Firm, flat, well-fitting mattresses for safer sleep. Check your cot's internal size and choose a mattress that fits it exactly.
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Find the right cot mattress for your baby's cot, cot bed, crib or Moses basket. We stock the full mattress ranges from Obaby, Tutti Bambini and Ickle Bubba in foam, fibre, sprung, pocket sprung and natural coir, in every standard UK nursery size.
Cot mattress buying guide
1. Measure your cot first
Measure the inside of the cot or cot bed, not the outside. The mattress should fit snugly, with a gap of no more than 4cm on any side. The common UK sizes are:
- Cot bed mattresses: 140 x 70cm. Fits most cot beds and lasts from birth into the toddler-bed years.
- Cot mattresses: 120 x 60cm. The standard size for a cot.
- Space saver cot mattresses: 100 x 50cm. For compact and space saver cots.
- Crib and Moses basket mattresses. These are made for a specific crib or basket, so check the size against your model.
- Travel cot mattresses. Extra comfort for travel cots and playpens.
2. Choose a mattress type
- Foam: lightweight, breathable and good value. Look for a removable, washable cover.
- Fibre: layers of hypoallergenic fibre, which suit babies with sensitivities.
- Sprung: a spring unit wrapped in nursery-grade foam or fibre, giving firm, even support.
- Pocket sprung: individually pocketed springs that respond as your baby moves. A good long-term choice for cot beds.
- Natural coir and wool: natural fillings that are breathable and help regulate temperature.
3. Dual-sided mattresses
Some mattresses have two sleeping sides. Examples are the Obaby Moisture Management mattress (a coir side for babies and a pocket sprung side for toddlers) and the Ickle Bubba All Seasons range (a cool mesh side for summer and soft jersey for winter). Use the Dual-Sided filter to find them.
4. Safety essentials
Always choose a firm, flat, waterproof mattress that fits the cot well. Use a new mattress for each baby. Obaby crib, cot and cot bed mattresses are tested to BS 7177 and BS EN 16890:2017.
