One of the most-asked questions we get in the mattress business is about mattress size. Most everyone knows the basics: a twin’s the smallest, a queen’s somewhere in the middle, and a king reigns supreme. But lots of people think that one person’s queen is another man’s double — or, more to the point, not everyone realizes that mattress sizes are standardized across the entire mattress industry.
So a twin from Sleep365 is the same size as a twin from any shop down the street (but stay put, buying from a store is so 2005). The size variances are small — about a half inch or so — from one manufacturer to the next.