Minecraft wiki entry for Furniture, associated text: To make a closet, first, dig two blocks tall and one block wide into a wall. If you want to make it wider, dig in deeper and start to dig spreading out. Then, go outside of the little "room" you've made and put a door at the entrance. You can make a four by four entrance but you will have to put double doors. Since you cannot really "place" armor in the game (except in 1.8, if you use an armor stand), you must use a chest and put the chest into the closet, or if you still want to be able to see the armor put up a row of item frames with the armor inside.