Size Charts & Fit Guides for Tops Find your fit. Measuring for Best Fit Measurements are in inches. When measuring, keep tape snug but not tight. Neck:Â Measure around the base, at the thickest part of your neck. Chest/Bust:Â Measure around the fullest part of your chest, under your arms, making sure the tape is straight across. Sleeves:Â Measure from the center back of your neck, down to your wrist, making sure the tape is straight Men's Tops/Shirts SizeNeckChestSleeve XS 13-14 30-33 31-32 S 14-15 34-37 32-33 M 15-16 38-41 33-34 L 16-17 42-45 34-35 XL 17-18 46-49 35-36 2XL 18-19 50-53 36-37 3XL 19-20 54-57 37-38 4XL 20-21 58-61 38-39 *TALL sizes are 1 1/2 - 2" longer in Sleeve length & body length Women's Tops/Shirts SizeChestSleeveMen's Equivalent XS 30-32 30-31 / S 32-34 31-32 XS M 34-36 32-33 XS-S L 36-38 33-34 S-M XL 38-40 34-35 M-L 2XL 40-42 35-36 L-XL