Size guide T-shirts

 SIZE WIDTH  LENGTH  SLEEVE CENTER BACK 
S 46.4 cm /  18 ¼ in 67.6 cm /  26 ⅝ in 41.3 cm /  16 ¼ in
M 51.4 cm /  20 ¼ 71.1 cm / 28 in 45 cm /  17 ¾ in
L 55.9 cm / 22 in 74.6 cm /  29 ⅜ in 48.3 cm / 19 in
XL 61 cm / 24 in 78.1 cm /  30 ¾ in 52 cm /  20 ½ in
2XL 66 cm / 26 in 80.3 cm /  31 ⅝ in 55.3 cm /  21 ¾ in
3XL 70.5 cm /  27 ¾ in 82.6 cm /  32 ½ in 59 cm /  23 ¼ in
4XL 75.6 cm /  29 ¾ in 85 cm /  33 ½ in 62.6 cm /  24 ⅝ in