Wearing only your underwear and standing with your feet together, use a tape measure to determine your measurements. It's important to check the size chart on the product page of each brand you are considering, as sizes and measurements can vary greatly.
Measure your jeans from the top of the waistband to the bottom of the crotch seam to find the rise. Consult the size chart on any brand product page to see where the rise will sit on your torso.
Waistband sits 2" or more below navel.
Waistband sits just below navel.
Waistband sits at or above navel.