Waist measurement when jeans or pants shopping without fitting

The trousers button at the waistband, take the side and measure around the neck from back to front, must come together just in front, then the pants fit around the stomach, because neck size is equal to half the waistband, fits to 99% always, the length can you measure anyway, by measuring the pants along the side of the leg.

Is very practical especially at the flea market or in markets, or if you do not like to get dressed and dressed, especially for men who do not like to try on anyway, and just everywhere, where you can buy textiles, but not or try on badly.

Have done that often in the US in jeans shop, always works.