How to measure in two easy steps A LengthPlace the end of a measuring tape beside the collar at the top of the garment (high point shoulder). Pull the tape to the bottom of the item. B ChestMeasure yourself around the fullest part of your chest. Keep the measuring tape horizontal. Inches Centimeters SizeLengthChestS2738 – 41M2842 – 45L2946 – 49XL3050 – 532XL3154 – 573XL3258 – 62 SizeLengthChestS68.696.5 – 104.1M71.1106.7 – 114.3L73.7116.8 – 124.5XL76.2127.0 – 134.62XL78.7137.2 – 144.83XL81.3147.3 – 157.5