Lay the shirt flat on a smooth surface
Smooth out wrinkles without stretching the fabric
Measure the chest width from armpit to armpit
Double the chest width for full chest circumference if needed
Measure the shoulder width from shoulder seam to shoulder seam
Measure the sleeve length from shoulder seam to cuff
Measure the front length from the highest shoulder point to the bottom hem
Measure the back length from the center back neckline to the bottom hem
Measure the collar width across the inside of the collar
Measure the waist width at the narrowest point of the shirt
Measure the hem width across the bottom edge
Compare all measurements to the size chart
Use the same method for each shirt to ensure consistency