Walk into any blank apparel distributor and you'll find hundreds of t-shirt options. Different brands, different fits, different colors — and different weights. That last one trips up a lot of people. Shirt weight is measured in ounces per square yard (oz)  — the heavier the number, the thicker and more substantial the fabric. It affects how the shirt feels, how it wears, how it prints, and how long it lasts. Choosing the right weight for your project isn't just about comfort