Funny Dog Shirt printed with “why don't YOU go fetch?” on a white background and letters that match this comical dog shirt's color. The SIZES are the sizes of the CLOTHES. NOT the size of your dog! Check our size charts & guidelines on measuring your puppy, small dog or large dog. Very comfortable for your dog! Double-stitched, sleeveless and made of a poly/cotton blend. This dog shirt comes in many delightful colors and sizes to delight every dog lover.