Cot Mattresses
Browse our cot mattresses for safe, supportive sleep for your little one. Choose from a range of firm, breathable mattresses designed for babies and toddlers. Shop trusted UK brands with free next day delivery and a 60 Night Comfort Trial.
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Silentnight Healthy Growth Cosy Toddler Mattress
RRP £134.00
Relyon Luxury Pocket Sprung Cot Bed Mattress
RRP £240.00
Relyon Classic Sprung Cot Bed Mattress
RRP £171.00
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What size is a cot mattress?
Our cot bed mattresses measure 70cm x 140cm, while our continental cot mattresses measure 60cm x 120cm, ensuring a perfect fit for standard cots and continental cribs.
How firm should a crib mattress be?
Mattresses for cots should always be very firm to support your baby safely. All of our cot mattresses meet UK safety standards and provide the correct support for healthy sleep.
What type of mattress is best for a cot?
The best cot mattress should be: firm, supportive, breathable, and easy to clean.
We stock a range of mattresses for cots from top UK brands, including Silentnight and Relyon, all designed for safe, comfortable sleep.
How much should I spend on a cot mattress?
Our cot mattresses range from around £150 to £250 depending on the features included.
Every baby mattress comes with free next day delivery and our 60 Night Comfort Trial with Mattress Online, so you can buy with confidence.
Advice and buying guides
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Why buy from Mattress Online?
Free delivery to most locations
Free next working day delivery on most of our mattresses and beds, or upgrade to weekend delivery.
Free 60-night mattress comfort trial
Test your mattress for 60 nights and if you don't like it, simply swap it.
Old mattress disposal
We can collect and recycle your mattress - saving it from landfill.
Sales Enquiries
Mon-Sat: 9:30am - 5:30pm
Sunday: 10am - 4pm
Customer Service
Mon-Sat: 9:30am - 5:30pm
Sunday: Closed
