The Patronus generally takes the shape of the animal with whom the person shares the deepest affinity. Yeah, that sounds about right.
Your typical 100% cotton t-shirt. Pre-shrunk to make sure your size is maintained throughout several washings, and classic fit, meaning it is not form fitted in the sides.
*The Purple colour is not available in sizes larger than 3XL at this time, sorry.
**The Royal and Smoke colours are not available in sizes larger than 4XL at this time, sorry.