There are different sizing systems for jeans depending upon where you are shopping, in which store and what country you’re in. Knowing your size before you set out would help you navigate clothing racks to find perfect pair of jeans. Just to be sure, you’ll still have to try them on before you buy them. It would be a good idea to have a measuring tape in your pocket when going out to buy jeans but before you go, measure your waist and hips. Wrap the measuring tape around the narrowest part of your waist and jot it down then do the same for your hips. Then go for inseam, it is a measurement goes from the button at the top of your jeans to the middle of your crotch.
All buy jeans after tying them on. No matter how perfectly you have measured yourself and studied your sizing chart, every manufacturer makes sizes slightly differently, so there is no guarantee that same size will fit in each store and at the same time, there exist ½ inch variation in size any way. Some jean styles tend to be low rise made to fit well below the natural waist. The inseam on a low rise jean will be shorter than your natural inseam. The inseam size is often indicated on the jeans’ tag in inches, but if not, you’ll just have to try the pair on to make sure they fit your inseam.
Some jeans may have a slightly different tagged waist size than the actual waist. This is often to eliminate half inches in sizing. Also note that after wearing and washing, jean will stretch and will be ½ inch roomier, so better pick a tight fit to start with. Don’t just go for sizes written on the jean tags, they vary from country to country, by manufacturers; depend on style, cut and fabric type stretch ability. Measuring your waist for denim jean is not so hard, just keep these tips in mind when shopping for jeans.