A commercial dimension greater than an actual masonry dimension usually by the thickness of a mortar joint.
The stated size of a tile, which usually includes a standard grout joint. The actual dimension is somewhat smaller.
The exact mainframe dimension minus any flange, fin or other accessory.
The named size; compare with Actual Size. An approximate rough cut dimension assigned to a piece of material as a convenience in referring to the piece, such as 2 by 4 or 500 pound. The stated size of a piece of lumber; its actual size is smaller. A dimension greater than a specified masonry unit dimension by the thickness of a mortar joint. This is the approximate facial size or thickness of tile, expressed in inches or fractions of an inch, for general reference, such as a "4 by 4" tile. Tubing measurement which has an inside diameter the same as iron pipe of the same stated size.
Nearest fractional equivalent to actual decimal dimension, from which small dimensional (plus and minus) deviations are allowed as manufacturing tolerances.
The stated size of a piece of lumber, such as a 2x4 or a 1x12. The actual dimension is somewhat smaller. Home Improvement Encyclopedia