Bed size refers to the dimensions of a mattress and the names given to standard sizes.
Beds themselves vary widely in size, depending on the size of the frame and degree of ornamentation, but are sold according to the size of the mattress they accommodate.
The dimensions and names vary considerably worldwide, with most countries having their own standards and terminology. Additionally, two mattresses with the same nominal size may still vary slightly in actual dimensions due to manufacturing tolerances, the level of padding, and the type of support.
The measurements below are to help illustrate the general bedding size chart. Do not be concerned with the flat sheet dimension, as it will be tucked under the mattress anyway and is not meant to be sized to the exact specifications of your mattress:
