Caliper (for tree diameter)

Caliper (for tree diameter) is a measurement of the diameter of a tree's trunk, typically taken at 6 inches above the ground for trees smaller than 4 inches in diameter, and at 12 inches above the ground for larger trees. The caliper measurement is used to assess the size and health of nursery trees and to determine planting standards. It is an important metric in landscaping, forestry, and nursery operations.