A twin size bed is is 38 inches wide and 75 inches long (approximately 97cm wide and 191cm long). This size is only generally available in the US, and not in the UK.

Eventually, twin beds’ popularity among American adults more or less faded into obsolescence, Hinds writes; today, queens are the most popular mattress size purchased, according to Consumer Reports.

Use our mattress size chart to compare standard mattress sizes and bed dimensions. Our mattress expert explains the factors that go into picking a mattress size that suits your needs.

Why we like this bed: A twin-size Allswell retails at Walmart for $194, but it's often less during the brand's frequent sales. It's an incredible price point for a bed of this quality, especially ...