The distance between two opposing sides of an object is measured using calipers.
They are relatively straightforward measurement devices with an interior and an outward point.
The two types of calipers: 3.1 Vernier caliper:
Vernier caliper is a measuring instrument used for measuring lengths with huge precision. The measurement is taken manually. 3.2 Digital caliper: A digital caliper is a measuring instrument used for measuring lengths with huge precision digitally.