Pick from:
A). If you're wearing a flat leg, add 2 to 3 inches (5-7.6 cm) to your waist measurement. Calculate your waist measurements to get a shoe length..
B). You want to be able to get an actual waist measurement when hanging the jeans. If you don't, you risk being " disproved " for your measurements..
C). Look for jeans that match your waist size; if you are wearing jeans for work or sports, choose some low waisted jeans with a fitted waist for men in a physically active lifestyle. This way, a fitted look doesn't show through in layers and is the most comfortable item for you to wear..
D). Take into account the " waist " of the jean, at low (hip), medium (above hip) or high (near the belly button) rise levels. The waist is more important than the inseam, because the jeans can be shortened..Choose from options above and answer: What most naturally follows?

How to buy jeans
Plan at least 1 hour to try on jeans.
Start in a shopping mall or at a large department store so that you can compare different styles.
Measure your waist and inseam before you go out.
Answer:
D).