Calipers n. pl. : An instrument, usually resembling a pair of dividers or compasses with curved legs, for measuring the diameter or thickness of bodies, as of work shaped in a lathe or planer, timber, masts, shot, etc.; or the bore of firearms, tubes, etc.; -- called also caliper compasses, or caliber compasses.

Example:
How do I make my Calipers look good?

Taxonomy
caliper, digital calipers, vernier caliper, measurements, dial caliper, jaws, scale, accuracy, Micrometer caliper, divider, reading, Vernier, edge, slider, the distance, workpiece, dial calipers, Tape measure.

Defination from the web:
calipers are used in the process of marking out suitable workpieces. ... Some digital calipers can be switched between metric and inch units. ... Digital calipers may contain some sort of "reading hold" feature, allowing the reading of dimensions ...