Mattress Sizes Guide is an independent guide site that publishes standard US mattress dimensions, charts and comparisons to help shoppers pick the right size. Our charts cover every standard size, from crib and Twin to Queen, King and California King, with exact dimensions in inches, feet and centimeters.
Sizes on this site follow US industry standards. We do not sell mattresses — we simply publish clear, accurate size information so you can compare options and choose with confidence.