We use Next Level style 3600 for our unisex t-shirts, sizes S-4X. Made of 4.3 ounce 100% combed cotton jersey. They are super-soft and comfortable. Shrinkage: 4% width, 5% length.
Port & Company T-Shirts: Sizes 4XL-6XL
We use Port & Company style PC61 for our big men's t-shirts. Made of 6.1 ounce, 100% ring spun cotton. Shrinkage: 3% width, 3% length.