Each of the 14 sizes fit a full Oval-8 size and an Oval-8 size plus a half. For example, a size 6 Oval-8 fits as either a 6 or a 6 1/2. Read on to learn more about what problems the Oval-8 treats, how to choose the correct size, how to purchase an Oval-8 and links to Oval-8 videos.