Half sleeve tattoos refer to a tattoo that covers the arm from the top to the elbow as a half sleeve shirt would. Variations on this are the full sleeve, that covers the top of the bicep to the wrist or the quarter sleeve which is the same as a quarter sleeve on a shirt that ends midway down the forearm. Some sleeves only cover the outer arm as the inner bicep is extremely sensitive and one of the most painful spots.The most popular designs of half sleeve tattoos are Koi Fish, Tribal, Celtic, and Floral. Sleeve tattoos have been more common for men but it is getting more and more popular for women to get half sleeves as well. These take lots of time and money, and usually many sessions.