The theoretical size from which the limits for that dimension are derived, by application of the allowance and tolerance, is the ____.

A) limits of size
B) allowance
C) basic size
D) tolerance

Theoretical Size

The ideal, nominal size of a part or feature as defined in drawings, before tolerances are applied.

Limits

In engineering and manufacturing, limits refer to the maximum and minimum dimensions a part can have to be considered acceptable.

Allowance

The intentional difference in dimensions between mating parts to ensure a proper fit.