Zuma Jays passionate about using sustainable, & environmentally friendly materials in our products when we can. No GMO's are used on our garments resulting in a softer cotton, trust us you'll notice the difference! This hoodie is a regular fit, so we recommend sticking with your normal size unless you like a relaxed fit, then go for the next size up. Small: 36" Medium: 38" Large: 40" X-Large: 42"