The baby studio 4 in 1 mattress protector sheet is designed to fit most standard cots 132cm x 71cm the sheet functions as a changing mat cot sheet a mattress protector and a super absorbent pad to help protect your mattress from little accidents the sheet is designed to minimise your babys ability to roll onto their tummy while sleeping features ibreathe fabric for ventilation a soft padded sleep mat and removable sides to minimise rolling 100 machine washable