Standard sizes. Standard bed sizes in the US and Canada are: Twin or single 38 in × 75 in (97 cm × 191 cm) There is a common misconception that a single bed is sometimes smaller than a twin. Buying a too-small mattress is one of the biggest mistakes new bed-buyers make. Couples who’ve been sleeping on a “double” (also known as a full-size mattress) since they got together may think they have enough room – until they learn that each person has only as much sleeping space as a baby’s crib! A bed is a piece of furniture which is used as a place to sleep or relax.. Most modern beds consist of a soft, cushioned mattress on a bed frame, the mattress resting either on a solid base, often wood slats, or a sprung base.Many beds include a box spring inner-sprung base, which is a large mattress-sized box containing wood and springs that provide additional support and suspension for the Lightweight and Portable The AmazonBasics padded pet bolster bed creates a welcoming go-to place for your pet to rest in the home, as well as a sense of home away from home when it’s time to travel or spend a weekend away. Measuring 27” x 52”, a crib or toddler mattress is just the right size for your baby’s first bed. These dimensions are widely accepted to be the standard across the US, so this size will fit with any standard crib you bring home for your young one. List: $6,500. MedCon: G. Stryker CircoElectric bed, model 460. 115 V, 60 Hz. Rotation-capable bed with upper and lower support frames allowing a burn or trauma patient to be shifted between prone, upright and supine positions. .