My son loves the Champion brand. I bought these t-shirts for him (he's a big guy) and they fit perfectly (a bit long for him). I believe they may tighten up a bit after washing/drying which would be fine with him.
Pros
Men's T-Shirts: Horizon Blue/Citrus Pink, Black/White, Caroline Blue/Lemon, Citrus Pink/Black, Light Pink/Concrete and Mint/Horizon Blue and 2X, 3X, 4X, 5X , sizes 6X, XLT, 2XLT, 3XLT and 4XLT.