cribs. U.S. regulations define a full-size crib as one whose inside dimensions are 28 ± 5⁄8 inches (71 ± 1.6 centimeters) in width and 52 3⁄8 ± 5⁄8 inches (133 ± 1.6 centimeters) in length.*. Inches: Length Inches: Local Bed Name: US: 71 cm: 132 cm: Crib: UK: 70 cm: 140 cm: Cot: Europe: 60 cm: 120 cm: Infant bed: IKEA (also US) 60 cm: 120 cm: IKEA Crib Non-full-size cribs may be larger or smaller, but must be rigid and must not have mesh sides. Union convertible crib: 53.5L x 30.5W x 33.5H (inches) Graco Benton crib: 56.7L x 29.8W x 40.5H Pottery Barn Lark crib: 59.5L x 32W x 46.5H Sorelle Annie Elite crib: 55L x 30.25W x 40.35H Babyletto Gelato crib: 55L x 31W x 35.2H Delta Children Brayden crib: 54.5L x … Standard size crib … Standard crib mattress … … is a baby crib with the following measurements: 52 3⁄8 ± 5⁄8 inches in length by 28 ± 5⁄8 inches in width Any new full-size crib mattress fits into any new standard size baby crib.