Our Letter X Costumes are just what you need if you have been invited to a party with a X theme. Use this section to find yourself a character starting with X. Costumes starting with the letter X include the X-Men and Xmas. You may think this is an almost impossible letter but our perfect solution is our X-men range. X-men has a huge cult following and is recognised the world over. If you have always wanted to be Wolverine then this is your chance. Get x-cited about this x-traordinary choice of letter X costumes.