Small single mattresses are by far our most popular sized mattress, measuring 3′ x 6’3″ (90 cm x 190 cm). As a 3ft 6 mattress, they provide comfy roominess but won’t overcrowd the average room. This makes them the perfect size for single people and those with small to medium-sized homes.

Shop the best single mattresses from RIC Sleep

All of our single mattresses are designed to provide the ultimate in comfort and support so you can sleep soundly.

What is the size of a single mattress?

Small single mattresses are 90cm wide by 190cm in length. This mattress measures 3′ wide by 6′ 3″ long in imperial measurements (3′ x6’3″) This mattress size is commonly referred to as a 6ft3 mattress. This size is the most common for bedrooms of small size, as it provides enough space for one person without being too big.

The table below shows how a small single mattress compares with other mattresses.

Type of mattressImperial Size (feet and inches)Metric Size (cm).
Small Single mattress3′ x6’3″90cm x190cm
Small Double Mattress4′ x6’3″120cm x190cm
Double mattress4’6″ x6’3″135cmx190cm
King Size mattress5′ x6’6″150cm x200cm
Superking mattress6′ x6’6″180cm x200cm