A twin bedspread in the United States measures 80 inches by 110 inches; a twin comforter measures 68 inches by 86 inches. Some variation is present in the measurements: a queen bedspread measures 102 inches by 116 inches, while a queen comforter measures 86 inches by 86 to 94 inches.
A western king-sized bedspread measures 114 inches by 120 inches, while the comforter measures 102 inches by 86 to 94 inches.
Other sizes of bedding include eastern king, daybed and various waterbed sizes. There is some variance between manufacturers in the sizes of bedding they produce.
Mattress thickness, the style of the bed frame and the desired overall look all come into play when choosing bedding.