Minecraft wiki entry for Signs.png-atlas, associated text: signs.png-atlas is a fixed-width 256 × 128-pixel file that store textures for all signs. It includes: entity/signs/acacia.png, entity/signs/birch.png, entity/signs/crimson.png, entity/signs/dark_oak.png, entity/signs/jungle.png, entity/signs/oak.png, entity/signs/spruce.png, entity/signs/warped.png.