What Are the Dimensions of a Double Mattress?
Double mattresses, also known as full size, measure 54 inches wide by 74 inches long. Their depth varies considerably and depends on the materials used to make the mattress. For example, full pillowtop mattresses are 16 inches deep on average.
While two adults can use a full bed, the limited width usually makes it a tight fit. Double mattresses are between twins and queens in terms of size, which makes them perfect for individual sleepers who want a little space to stretch out.