EXTRA SOFT MUSLIN CRIB SHEET: 100% cotton, extra soft muslin crib sheet is pre-washed for softness against baby's delicate skin, stays breathable while keeping your baby warm and cuddly, fully elastic corners that allow for easy removal, as well as a perfect fit after wash, wash and dry before use for best fit, fits standard size crib: 28"x52" (71cm x 132cm), 9" (22cm) deep pockets for snug fit on mattress, designed by Mushie in the US