There is an unfolding list of sizes at our every's T-shirt's or sweatshirt's website where you can check out their availability. There is also a specific size chart of them with its dimensions in centimetres.
See an example product: https://punkparrot.com/en/vegan-womenst-shirt-punk-parrot.html
To choose the best size for you don't just go to usual size you wear (ex. S, M, L, etc.) - better compare dimensions in centimetres of your favorite T-shirt or sweatshirt laid flat and without stretching it - with the dimensions in chart of concrete product. Dimensions here may differ from our actual items for approximately +/- 1 cm.
More on order time and products availability - here