Size Chart XS S M L XL 2XL 3XL CHEST 31-32 33-35 36-38 39-42 43-45 46-49 50-53 Product Flat Measurements XS S M L XL 2XL 3XL CHEST 17.5 18.5 19.5 21 22.5 24 25.5 BODY LENGTH 24 24.75 25.5 26.25 27 27.75 27.75 SLEEVE LENGTH 15 15.5 16 16.63 17.25 17.88 18.5 CHEST Measured across chest one inch below armhole when laid flat. SLEEVE LENGTH Start at center of neck and measure down shoulder, down sleeve to hem. BODY LENGTH AT BACK Measured from high point of shoulder from the back. Get the best Fit! Get one of your shirts that fits you the way you want. If you need tight...get a tight shirt. If you want loose...get a loose shirt...and so on. Lay it on flat surface for measuring. Now using a measure tape. Measure this shirt and use the measurements as your template.