Standard US Mattress Sizes / Bed Sizes Table
US Mattress sizes are mostly standardized, and usually only vary 1 inch from this bed sizes table:
Use the bed size table to help fit sheets, comforters, quilts, bedskirts, and other bedding items. The twin size bed, full size bed, queen size bed, king size bed, and california king size bed measurements are all close enough among US bedding manufacturers that you should not have any problems fitting bedding.
Check bedding sizes against mattress sizes to be sure comforters, bedspreads, quilts, duvet covers, and top sheets have a long enough drop to cover the thickness of your mattress measurements.
Convert U.S. Mattress Size Dimensions to Metric
Use the following coversion ratios for mattress measurements in metric units:
Here's a handy tool to help convert mattress size measurements into metric, or visa versa.
See also: High Density Foam Mattress Measurements and Durability