A 48" wide mattress is classified as a 3/4, falling in between a standard twin and a full.
queen
The standard queen size Sheets for American Size Mattress are: 60"( inch) by 80" ( inch ).
four inch
7/8
it is a special size now a lot of motor-homes and travel trailers have 49 inch beds you will have to order one
full
There are 30 inch side rails available for twin size beds that tuck between the mattress.
A single size mattress is also called a twin size mattress and the standard measurement is 39" X 75". The other type of single mattress is a super single, which is a larger version that measures 48" X 84" and can accommodate a much taller and broader individual.
what is the physical size of a queensize mattress
A king size mattress is 76" wide x 80" long and the queen size is 16" less than the king size.
A queen mattress is 6 inches wider and 5 inches longer than a full size mattress. You could make a 6 inch tuck down the middle of the bed skirt and it would work.
A standard full size mattress is 54 inches wide. Some brands, such as Serta are actually about 53 inches wide. We just acquired an old bed frame that is only 52 inches wide and face the same problem with finding a narrow full size mattress. We plan to go to a mattress store with the tape measure and see what we can find.