Minecraft wiki entry for Furniture, associated text: A sofa can be made using 2-4 stair blocks, with a sign attached to either side as "arms". Also, as of Java Edition 1.4.2, one could use stairs facing inward to create "arms". An alternate type of sofa can be made by placing 2 or more slabs in a row and surround the sides and back with blank signs. To make a 'leather' sofa, use slabs surrounded by wool blocks.