Time and time again I see it, women who need a new pair of jeans but become frustrated because they either don't know their size or don't know how to convert their junior or women's size into waist sizing. There is such an easy and quick fix to this problem! Just take either your junior or women's size and add 22 to it to find your waist size range. This may sound weird but it works, almost all of the time. So for example if you wear a size 7, your waist size would be around a 29. Just keep in mind that your size will always vary depending on the brand and style of the jean. So, this is a great place to start but definitely try the jeans on in the fitting room to make sure that they fit how they should and adjust from there.