noun, noun which may take the genitive case particle 'no'
Refers to the real, unscaled dimensions of an object, image, or document. Often used in printing, design, and technical settings.
Please print this image at actual size.
Check the full-size drawing.
actual size; full size
Compound of 原 (original) and 寸 (measurement, size). The exact historical derivation is uncertain, but the kanji combination transparently conveys 'original size'.