All items are a unisex fit and run true to size. Brand of material is Russell and is a preshrunk garmet. Youth sizes are S(6/8), M(10/12), L(14/16), Adults sizes come in Small through XL and extended sizes for a small upcharge. If you need a size larger than a 3x, please send me a message and I can give you your options. I choose to use this brand because it is a good quality brand that is also very affordable. For contiunity purposes I only offer one brand for all items, but am happy to make you an item using a specific brand of your choice. If you love a specific brand just send me a message and I can give you a price on what it would be.