1. Chest
Measure the full circumference around the chest at the fullest part, just under the arms — keep the tape level all the way around.
2. Shoulder Width
Measure straight across the back, from one shoulder seam to the other shoulder seam.
3. Bottom Opening
Measure the full circumference around the bottom hem opening of the shirt — all the way around, not just edge to edge.
4. Shirt Length
Measure from the highest point of the shoulder seam straight down to the bottom hem.
5. Sleeve Length
Measure from the shoulder seam down the outside of the sleeve to the cuff edge.