The size of a floor tile commonly used, is A. 15 cm × 15 cm × 1.8 cm B. 20 cm × 20 cm × 2 cm C. 22.5 × 22.5 cm × 2.2 cm D. All the above

The correct answer is D. All the above.

Floor tiles are available in a variety of sizes, but the most common sizes are 15 cm × 15 cm, 20 cm × 20 cm, and 22.5 × 22.5 cm. The thickness of floor tiles is also variable, but the most common thickness is 1.8 cm, 2 cm, and 2.2 cm.

The size of the floor tile you choose will depend on the size of the room you are tiling, the style of the room, and your personal preferences. If you are tiling a small room, you may want to choose a smaller tile size to make the room feel larger. If you are tiling a large room, you may want to choose a larger tile size to make the room feel more spacious.

The style of the room will also affect the size of the tile you choose. If you are tiling a traditional room, you may want to choose a smaller tile size. If you are tiling a modern room, you may want to choose a larger tile size.

Finally, your personal preferences will also play a role in the size of the tile you choose. If you like a clean, modern look, you may want to choose a larger tile size. If you like a more traditional look, you may want to choose a smaller tile size.

No matter what size tile you choose, it is important to make sure that the tiles are installed properly. If the tiles are not installed properly, they can come loose and create a tripping hazard.