What unit is used to measure the thickness of a non-ferrous metal casket?

The thickness of a non-ferrous metal casket is best measured using gauge. Gauge is a standard unit that provides a consistent method for determining the thickness of various materials, including metals. The use of gauge as a measurement allows for a standardized understanding of thickness across different types of metals and applications, making it easier to compare and specify casket materials.

Other options, such as ounces per square foot or inches, are not commonly used in the casket industry for defining material thickness. Ounces per square foot is typically related to weight and area rather than direct thickness. While inches and millimeters are units of length, they don't account for the specific standardized measurements that gauge provides for metals, which makes gauge the most appropriate choice in this context.