You can read more very useful resource. Dimension of mattresses are in inches width x length format. Twin Size Mattress Dimensions Ideas Bed Measurements Twin Size Though the word double would suggest that a full or double bed is twice the size of a twin single mattress that s not the case. Bed sizes compared . Compare beds and their features side by side with sleep advisor s mattress comparison chart tool that will help you get a clear picture about price firmness warranty trial and many other things you might need. Use this mattress dimension guide to find your perfect fit. Sufficient for adults that need more room than what a twin can offer. The following chart gives the most common mattress size dimensions in united states europe and asia region. Twin bed is 39 x 75 97 x 191 cm which roughly compares with uk ireland s single 36 x 75 or 91 x 191 cm and continental european 90 x 200 cm 35 x 79. Twin mattress dimensions 38 x 75 inches twin xl mattress dimensions 38 x 80 i