Most apparel is available in both male and female sizing.
The classic t-shirt is available in male sizes S-5XL and female sizes S-3XL. Male sizes are considered unisex.
The following products are only available in male/unisex sizes: Ringer T-Shirt, Baseball T-Shirt, Hoodies.
You can check out size charts here. Toggle between Male and Female sizing by clicking the blue buttons at the top (pictured below):