I ordered these because the G500 Adult Unisex fit in size Small is a little too snug in width, yet the Medium is too big in length. I am 5'3", so the Youth XL is a perfect fit for me. It is shorter in length and the YXL fits like an adult medium in width, with the length closer to an adult small (slightly shorter). All of the Heather colors are great and the shirt style is soft and lightweight, yet no see throughs.