Bed sheets come in two main varieties--flat or fitted. A extended bed sheet is openly a rectangular sheet of cloth, while a fitted bed sheet has its four corners, and sometimes two or four sides, fitted with elastic, to be given over only as a lowermost sheet. The purpose of a fitted bottom sheet is to keep it from slipping off the mattress while the bed is in use. A particular way of folding and tucking while making Kids Bedding the bed, known as "hospital corners," is sometimes given to when the basic sheet is flat rather than fitted.
When making a bed, the patterned or monogrammed roundabout of the greatest sheet is placed facing down and then the top edge is folded towards the foot of the bed, exposing the design.