Total Length
Measure straight down from the top of the waistband to the bottom hem, along the side seam of the pants.

Waist
Align the front and back of the waistband neatly, then measure horizontally from one end to the other.

Hip
Mark a point approximately 20cm down from the waistband along the side seam, then measure horizontally from one end to the other.

Thigh
Measure horizontally from one end to the other, starting approximately 2.5cm below the lowest point where the inseam seams meet.

Hem
Measure the horizontal width from one end to the other at the very bottom hem of the pants.