Use this chart for girls tops, shorts and pants. SHIRTS height. 1. Measure height on a flat surface - no shoes, head to floor. 2. Measure waist using the narrowest area. 3. Measure fullest chest area, as well as hips. 4. Measure weight in pounds. Use this chart for girls skirts, skorts, and jumpers. FEMALE SIZING CHART (CONT.) 1.