This method might be a little easier with a friend’s help. If doing this by yourself is too difficult, you can also try measuring the length of a long sleeve shirt that fits you well.
Take a deep breath to make sure the measuring tape doesn’t constrict (this will give you some breathing room in the chest).
Make sure the measuring tape has a close fit against your skin, but is not uncomfortably tight. To leave yourself some room, place a finger underneath the measuring tape.
Small: neck size of 14–14. 5 in (36–37 cm), sleeve length of 33 in (84 cm), chest size of 35–37 in (89–94 cm), and waist size of 29–31 in (74–79 cm). Medium: neck size of 15–15. 5 in (38–39 cm), sleeve length of 34 in (86 cm), chest size of 38–40 in (97–102 cm), and waist size of 32–34 in (81–86 cm). Large: neck size of 16–16. 5 in (41–42 cm), sleeve length of 35 in (89 cm), chest size of 41–43 in (100–110 cm), and waist size of 35–37 in (89–94 cm). Extra-Large: neck size of 17–17. 5 in (43–44 cm), sleeve length of 36 in (91 cm), chest size of 44–46 in (110–120 cm), and waist size of 38–40 in (97–102 cm).
A shirt that’s size is listed as “16 / 34-35” has a neck measurement of 16 inches (41 cm) and a sleeve measurement of 34–35 inches (86–89 cm).
Classic fit: Also known as traditional fit, this style offers some breathing room in the chest and a looser fit in the shoulders. Modern fit: This style offers a more tailored look, as it fits closer to your chest than a traditional dress shirt. Slim fit: This sharp style fits snugly across your chest and offers a more tailored fit in the shoulders, sleeves, and armholes. Shirts in this style will have a tighter fit in the waist as well.
