Carpet

Carpets are thin blocks used for decoration. They are the same thickness as pressure plates. They are useful if you want a carpeted floor without using wool blocks as the material. They have a negligible hitbox, allowing a person to walk over them without elevating $1/16$ of a block. This is similar to how pressure plates work, although you cannot fall through a carpet. Carpets can be helpful when carpeting upstairs rooms without the ceiling of the next floor down being partially made of wool.

Usage

 * Carpets must be placed on a block, and cannot be placed freely or be free-floating in the world.
 * Carpets can be pushed and pulled by pistons/sticky pistons, but will pop off if pushed onto a hole.
 * You can craft Carpets in different colors by placing two blocks of wool of your desired color next to each other. This means that you do not need a crafting table to make them.
 * Carpets cannot be crafted with two differently colored wool blocks.
 * Carpets can break falling sand and gravel.
 * Carpets can be used as a safer alternative to decorative flooring, as wool is flammable, but interestingly, carpets are not.
 * Carpets are a more efficient alternative to flooring than full wool blocks.
 * Carpets do not prevent mobs from spawning.
 * Carpets placed above, or around, mushrooms growing naturally under trees will break the mushrooms if the mushroom is in a high light level, but will not break the carpet, leaving a floating carpet.
 * Carpets can be used to hide redstone blocks, levers, pistons, hoppers, dispencers, and droppers. They could be used to hide redstone dust also but then it would only be as efficient as if it was any other block so you might as well use wool (if you want a wacky color) to save resources. Idea by MINECRAFT user LABHOUSE

Trivia

 * It is possible to use them to make a more realistic table by placing them on fence posts next to each other.
 * Carpets have a bottom texture.
 * Carpets can be destroyed by fluids.
 * Carpets are not flammable.
 * When you place blocks on it, those appear a block above the carpet -- like other partial blocks, carpets "claim" the entire block.
 * Unlike Pressure Plates, carpets cover the entire square they are placed on.
 * Carpet is opaque block, however, it does not decrease light going through it. Undead mobs like zombies burn underneath it in the daylight.
 * Carpet allows light to pass through it. Therefore, placing carpet on a pool of lava will allow you to walk across without losing light. This also allows lighting for houses that don't take up wall or floor space.
 * If the player sprints across carpet, the particle effects are those of the blocks that are directly below it.

Gallery
Teppich Tapis カーペット Dywan Ковёр 地毯