Minecraft wiki entry for Furniture, associated text: An alternate mirror is an item frame with the Steve mob head in it, or you can mine a 2 block deep hole in the wall, place a Steve mob head, then place a glass block at the front. (This is only an accurate reflection if you're using the default Steve skin, but if you use the command /give @p skull 1 3 {SkullOwner:PlayerName}, you can get a head with your skin to use.) You can also use a banner, which the pattern follows: