King Bed Size & Dimensions Guide

King size bed dimensions typically measure 76 inches wide by 80 inches long or 193 cm wide by 203 cm long. However, you should check with the manufacturer as king size mattress dimensions can vary slightly. For more information on mattress sizes, check out our Mattress Size Guide and shop king mattresses.

When deciding between a king mattress and a queen mattress, the choice comes down to space needs and bedroom size. A king size mattress measures 76 inches wide by 80 inches long, offering the most room for couples, families who share the bed, or anyone upgrading to a more spacious setup in Canada. A queen mattress, by comparison, typically measure 60 inches wide by 80 inches long, making it more compact while still providing ample space for couples and fitting comfortably in most rooms. If you have the space and want maximum comfort, a king mattress is ideal, while a queen can be a practical, space-efficient choice without compromising support. Still not sure which is right for you? Get tips on choosing the right bed size for your lifestyle and shop king mattresses.

When choosing between a king mattress and a double mattress size, it comes down to space and sleeping needs. A king mattress typically measures 76 inches wide by 80 inches long, providing plenty of room for couples, families who share the bed, or anyone who wants maximum personal space. A double mattress, also called a full size mattress, typically measures 53 inches wide by 75 inches long, making it a more compact option ideal for solo sleepers, smaller bedrooms, or guest rooms. If your bedroom can accommodate it and you want extra space to stretch out, a king is the most luxurious choice. For tighter spaces or a more budget-friendly option, a double mattress still delivers comfort without taking over the room.

A Casper king mattress size is perfect for couples and families. It combines Casper’s signature comfort and support with durable materials that adapt to your body, helping you sleep better night after night. With innovative options like foam, hybrid, and cooling designs, plus free shipping and easy delivery in a mattress in a box, a Casper king mattress is a high-quality sleep solution. Shop Casper king mattresses.