Width: Place the tape measure under your arms at the fullest part of your chest, wrap around your body until your fingers meet and mark the measurement.
Length: Measure from top of shirt at the back of the neck to the bottom hem.
Sleeve Length: Start at the centre back of the neck, measure across the shoulder to the elbow and down to the wrist. Round up to the nearest half inch.
*This sizing chart measurements are closest approximation with a 1/2 inch variance.