If you're gonna buy panties, remember that women's underwear is sized based on hip size rather than waist size, so a 34-36 inch waisted (male) in a men's L size underwear would likely have 38-39 inch hips (use a tape measure around the fullest part of the butt and hips) and they'd fall under a medium or size 6 panties.
Just completely ignore the waist size on women's measurements they're not meant for you.