Line illustration depicting a woman's waist measurement, used as a visual guide on the TOMSCOUT Underwear Size Chart.  

For the best fit, measure around your natural waistline, which is typically located around your belly button.

Size  Waist (cm) Weight (kg)
M 70 - 76 40 - 50
L 76 - 82 50 - 60
XL 82 - 88 60 - 70
2XL 88 - 96 70 - 80
Make sure the tape is parallel to the ground and snug but not too tight.