This document provides information about customary units of measurement used in the United States for length, capacity, and weight. It includes tables listing common customary units for each category along with their equivalents. For example, it states that 1 foot is equal to 12 inches, 1 cup is equal to 8 fluid ounces, and 1 pound is equal to 16 ounces. The document also includes examples of converting between units within each system.