scale; vernier caliper
Refers to a measuring instrument, especially a vernier caliper, used for precise length measurements. Not to be confused with 'scale' as in size or musical scale.
Measure the thickness of the part with a vernier caliper.
I measured the thickness of the part with a caliper.
I placed the caliper against the edge of the wood to check its length.
scale model
short scale
economy of scale; cost benefit from larger scale
truck scale; weighbridge
sliding scale