outside measurements; external dimensions
Refers to the outer dimensions of an object, such as a box, vehicle, or container. Often used in technical or specification contexts.
The outside measurements of this box are 30 cm tall and 20 cm wide.
車の外法を確認してから駐車場を選んだ。
I chose a parking lot after checking the car's external dimensions.
Compound of 外 (そと, 'outside') and 法 (のり, 'rule, measure'). The reading のり for 法 is an older, less common reading meaning 'measure' or 'standard'.