1. NECK
Open the shirt and lay the collar flat. Measure straight from the button to the end of the buttonhole.
2. CHEST
Lay the shirt flat with buttons fastened and measure 1" under the armhole. Measure from side to side and double the measurement across the chest.
3. WAIST
Lay the shirt flat with buttons fastened and measure from side to side and double the measurement across the waist. The waist is located 8" below armhole.