HOW TO MEASURE?

Lots of websites and companies spec jeans differently. This is how we do it at Railcar.

How To Measure The Waistband 
Button the waistband and hold the front and the back of the waistband and measure.
How To Measure The Front Rise
Measure the bottom of the crotch from the front panel to the top of the waistband. 
How To Measure The Hip
Measure the widest part of the jean, it is usually right where the fly begins to end.
How To Measure The Back Rise
Measure the bottom of the crotch from the back panel to the top of the waistband.
 How To Measure The Length 
Measure on the inseam stitch from the crotch to the bottom
How To Measure The Thigh 
Measure the thigh 2 inches below the crotch and straight out.
How To Measure The Knee 
Measure the knee 13 inches down from the crotch and straight out.
How To Measure The Bottom Opening 
Measure the bottom opening at the bottom from left to right.