To help you here are the most common mattress sizes in the UK
| TypeSingle Small double (three quarter) Double King size Super king size |
Size in Inches36″ x 75″ 48″ x 75″ 54″ x 75″ 60″ x 78″ 72″ x 78″ |
Size in cm90 x 190cm 120 x 190cm 135 x 190cm 150 x 200cm 180 x 200cm |
Be aware that these are UK sizes, and my differ somewhat to their US counterparts. Also the guide above is for mattresses only, beds may be larger as the bed frame will add extra inches.