Wear fitted pants or leggings and stand straight with feet about hip-width apart
Place a measuring tape at the crotch seam where the legs meet
Run the tape straight down the inside of one leg to the ankle bone or desired hem length
Keep the tape snug but not tight
Read the measurement in inches or centimeters
If measuring without help, use a pair of well-fitting pants and measure from the crotch seam to the bottom hem
For a more accurate fit, measure both legs and use the longer inseam if they differ
Compare the inseam to the pants size chart before buying