Dimensions of mattresses and box springs

Mattress Dimensions (Nominal)* in USA and Canada

This page is intended to inform you about the most popular standard sizes* in the United States and Canada and is not a list of all sizes available on the market. For other sizes, such as RV sizes or custom sizes, please contact one of our representatives at one of our stores.

*Warning: The normalized dimensions (Standards) are rounded values ​​which are used for reference purposes and do not constitute the exact size of mattresses or box springs. Two mattresses of the same nominal size may have slightly different dimensions due to manufacturing tolerances, amount of stuffing, type of materials and type of support, etc. To obtain the exact dimension of a specific mattress, it is best to contact one of our representatives in one of our stores.


Standard Dimensions* of Mattresses:

Crib 28″ × 52″ (71 cm × 132 cm)
Half-Queen 30 in x 80 in (76.2 cm x 203.5 cm)
Single 39 in × 75 in (99 cm × 190.5 cm)
Single Long (XL) 39 in × 80 in 99 cm × 203 cm (99 cm × 203.5 cm)
Three Quarters (3/4) 48″ × 75″ (122 cm × 190.5 cm)
Double 54 in × 75 in (137 cm × 190.5 cm)
Double Long (XL) 54 in × 80 in (137 cm × 203.5 cm)
Queen 60″ × 80″ (152.5 cm × 203.5 cm)
King 76″ × 80″ (193 cm × 203.5 cm)
Californian King 72″ × 84″ (183 cm × 213.5 cm)

Standardized* dimensions of the bed bases:

In the United States and Canada, standard box spring dimensions are the same as standard bed sizes, except:
• The king box spring will consist of two single L or two XL;
• The California King box spring will consist of two 36″ x 84″ (91.5 cm x 213.5 cm) pieces.