Manufacturers produce bricks to their own specifications, so it is important to confirm sizes; however, the sizes in the tables below come from the Brick Industry Association and are the most commonly produced sizes.  Actual Size, also referred to as Specified Size, is the real dimension of each brick.  Nominal size is the actual size plus the width of the mortar joint.  Most bricks are manufactured so that the nominal sizes fit into a grid of 4", which coincides with the modules of other building materials such as doors, windows, and wood components.

Assuming a 3/8" Mortar Joint Between Bricks

Brick TypeActual Size
D x H x L (inches)
Nominal Size
D x H x L
Vertical Course
Standard3 5/8 x 2 1/4 x 8Not modular3 courses = 8"
Modular3 5/8 x 2 1/4 x 7 5/84 x 2 2/3 x 83 courses = 8"
Norman3 5/8 x 2 1/4 x 11 5/84 x 2 2/3 x 123 courses = 8"
Roman3 5/8 x 1 5/8 x 11 5/84 x 2 x 121 course = 2"
Jumbo3 5/8 x 2 3/4 x 84 x 3 x 81 course = 3"
Economy3 5/8 x 3 5/8 x 7 5/84 x 4 x 81 course = 4"
Engineer3 5/8 x 2 13/16 x 7 5/84 x 3 1/5 x 85 courses = 16"
King2 3/4 x 2 5/8 x 9 5/8Not modular5 courses = 16"
Queen2 3/4 x 2 3/4 x 7 5/8Not modular5 courses = 16"
Utility3 5/8 x 3 5/8 x 11 5/84 x 4 x 121 course = 4"
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Assuming a 1/2" Mortar Joint Between Bricks

Brick TypeActual Size
D x H x L (inches)
Nominal Size
D x H x L
Vertical Course
Standard3 1/2 x 2 1/4 x 8Not modular3 courses = 8"
Modular3 1/2 x 2 1/4 x 7 1/24 x 2 2/3 x 83 courses = 8"
Norman3 1/2 x 2 1/4 x 11 1/24 x 2 2/3 x 123 courses = 8"
Roman3 1/2 x 1 1/2 x 11 1/24 x 2 x 121 course = 2"
Jumbo3 1/2 x 2 1/2 x 84 x 3 x 81 course = 3"
Economy3 1/2 x 3 1/2 x 7 1/24 x 4 x 81 course = 4"
Engineer3 1/2 x 2 3/4 x 7 1/24 x 3 1/5 x 85 courses = 16"
King3 x 2 3/4 x 9 3/4Not modular5 courses = 16"
Queen3 x 2 3/4 x 8Not modular5 courses = 16"
Utility3 1/2 x 3 1/2 x 11 1/24 x 4 x 121 course = 4"

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Clay Unit Masonry: 04 21 00

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