Marine Corps 4th Battalion Large Front and Back Logo Long Sleeve Tee Sizing recommendations: These are technically Unisex Tees (Gildan Brand). I'd recommend staying true to size for an average fit. If you like it more form fitting then size down and if you want oversize, size up. If wanting more than one item, bundles will help you save on cost and shipping cost! Any questions, feel free to ask! USMC, Marine Corps, Parris Island, military, veteran