Memory Foam

Size Chart

Special Orders / Sizes

We are sorry but the only way to bring you such a competitively priced product is to keep to only producing standard sized items. We therefore do NOT make special sizes or to order.


Safe Memory Foam

All grades of our foam are suitable for use in domestic applications and comply with the requirements of schedule 1, Part 1: The Furniture and Furnishings (Fire) (Safety) Regulations 1988 (Amended 1989, 1993).
Technically all of the grades are classified at least ‘S’ according to the fatigue classification set out in BS3379:1991.


Buying a memory foam mattress that's too small is one of the biggest mistakes new mattress buyers make. So here are the Hypnia memory foam mattress size guidelines:

Size Tolerance

Please allow for a tolerance on the sizes of the foam products. A 2cm variance in size in memory foam is perfectly normal depending on conditions and room temperature.

Single Mattress & Single Mattress Toppers
Single Mattresses are the smallest size memory foam mattress manufactured by Hypnia, they messure 3' x 6'3" or 90cm x 190cm

Double Mattress & Double Mattress Toppers
Double Mattresses, sometimes know as full mattresses (in the US) are 4'6" x 6'3" or 135cm x 190cm

King Size Mattress & King Size Mattress Toppers
A king size mattress is 5' x 6'6" or 150cm  x 200cm 6 inches wider and 3 inches longer than a double mattress. The king size mattress is today's most popular mattress size.

Super King Size Mattress & Super King Size Mattress
Super King Mattress are 6' x 6'6" or 180cm x 200cm The same length a king size mattress but a whole 12 inches wider.

Find Out More

Learn more about memory foam including how it was created and what it could do to improve your nights sleep
Learn more about how a Hypnia memory foam mattress is made