You can also order them on
Amazon, though it helps to know your size in advance. The Amazon listing describes the shoes as "Men's X-talon 212." My understanding is that the shoes are unisex. I suppose that the naming is to indicate that the sizes are calibrated to the US men's scale.
From my experience, the sizes are consistent with regular shoes. I wear US size 12, and have tried X-talon sizes 11.5 and 12. Size 12 fit perfectly, and 11.5 was quite snug. Your results may vary.