Most of our costumes are standard adult size. Some Halloween items are available in a choice of sizes or colors, which is specified in the description. For general costuming purposes, a men's size large will fit a women's size XL. Regarding poet and pirate shirts, these are cut large and made to be worn "roomy" with puffy sleeves. The adjustable lacing makes them comfortable for most adults. Since clothing manufacturers and different countries vary in their sizing specifications, Costume Arena recommends that you use our sizing measurements when ordering costumes or accessories where size is a variable.