For the sarcasm lover in all of us. Check out this witty “This is Bob. Bob Has No Arms. Knock Knock. Who is it? It’s Not Bob.” design on apparel and gifts. -- Choose from our vast selection of magnets to match with your desired size to make the perfect custom magnet. Pick your favorite: Movies, TV Shows, Art, and so much more! Available in two sizes. Perfect to decorate your fridge, locker, or any magnetic surface with.