Mattress Sizes

Mattress Dimensions

Dimensions of purchased mattresses are often a bit smaller.

Standard Single (Twin): 38″ x 75″
Standard Extra-long Single (Twin): 38″ x 80″
Standard Double (Full): 54″ x 75″
Standard Extra-long Double (Full): 54″ x 80″
Standard Queen: 60″ x 80″
Standard King: 76″ x 80″ 

Upper bunk mattresses should not exceed 9″ in thickness, as a minimum of 5″ in height is required between the top of the mattress and the top of the safety rail to meet safety standards. For questions or concerns please do not hesitate to contact us.


Trundle Mattress Dimensions

Typically, trundle mattresses are custom-cut foam.

Trundle Single (Twin): 38″ x 73″
Trundle Double (Full): 54″ x 73″
Trundle Queen: 60″ x 78″
Trundle King: 76″ x 78″

To fit properly under the lower bunk, the thickness of the trundle mattress should not exceed 7″.


Single and Twin refer to the same mattress width of 38″.
Double and Full refer to the same mattress width of 54″.

Standard single and double bed mattresses are 75 inches long while standard queen and king bed mattresses are 80 inches long. But extra long (XL) single and double mattresses are available which are also 80 inches long. If you choose Single over Queen, for example, then the upper bunk will accommodate a Single XL mattress.