The Gildan 64000 makes for a great staple t-shirt. It's made of a heavier cotton and the double-stitched neckline and sleeves give it more durability. It's part of Gildan's Softstyle line, so it's softer and more fitted than some of Gildan's other t-shirt models.
Model is wearing a size M. He's 6.2 feet (190 cm) tall, chest circumference 37.7" (96 cm), waist circumference 33.4" (85 cm).