Washroom tiles can be glossy or matte, depending on your needs and style.
Glossy tiles are good for small washrooms because they reflect light which makes a small space look larger and brighter. They are also very easy to clean, but may be slippery when wet, so it is best to use them on walls rather than floors.
Matt tiles have a nice modern, elegant look, and because they are slip-resistant, they can be very safe for washroom floors. Many people use both gloss and matte, gloss on the walls, and matte on the floors, which is great for best results.