King Size Toppers

Comfort Sized for a King Bed

Give your king size mattress a new layer of comfort with our range of mattress toppers.
Shop King Size Toppers
Good to know
A king size mattress topper fits a UK king mattress at 150 x 200cm, adding an extra layer of comfort and support without needing to replace the mattress itself.
Frequently asked

What size is a king size mattress topper?

A UK king size mattress topper is sized at 150 x 200cm.

Will a king topper fit any king mattress?

It's sized to fit standard UK king mattresses — always check dimensions if you have a non-standard mattress.

A GOOD NIGHTS SLEEP

  • MADE IN THE UK

    Slumberdown pillows & Duvets are designed and made in the UK, by a family run business with over 100 years of textile experience

  • DESIGNED FOR HOW YOU SLEEP

    We want you and your family to get the best night's sleep possible. So we offer a range of duvets, pillows and more design for how your sleep

  • Sleep soundly 5cm Mattress Topper Slumberdown

    MADE WITH CARE

    Sustainability has long been a high priority for Slumberdown. Our packaging contains a minumum 30% recycled content, our Hollowfibre is 100% recycled and across the business we are working to next zero and zero to landfill targets,

  • Sleep Soundly 10cm Extra Deep Mattress Topper Slumberdown

    Easy to care for

    Most of our products are machine washable and tumble dryer safe, so keeping your sleep space fresh is simple.