PSYCHO BUNNY • Black Classic Short Sleeve Polo Shirt Men's Size 7, or XL X-Large Pre-Owned, Great Condition Smoke Free Home. For a Psycho Bunny mens size 7 shirt, that corresponds to a traditional XL (Extra Large) size. Psycho Bunny's sizing uses a numerical system where 7 is the equivalent of XL. You can generally expect a chest measurement of around 46 inches and a waist of 36.5 inches for this size.