An easy way to tell between Adidas men's and women's athletic pants?

I've got a bunch of Adidas pants that I'm looking to sell on eBay. With some, it's easy to tell. When they're the 2XL's and fit me, they're obviously men's. But for others, it's tougher. I've got smalls that list them as S under all the countries except for Canada which lists them as S/P. They look small but could fit a guy. Then, I've got brown pants with pink stripes that are listed as a Large, and have an L under all countries except for Japan which is a 2XOT. Any sure-fire way to tell? Do women's pants always have a number for a size? Like an XL is an 18-20?