When choosing accent tiles, you'll find plenty of design choices, but deciding between these two categories can help you weed out lots of irrelevant options:
Decorative accent tiles: either in the same color or pattern, these tiles can be placed next to each other in a rather flexible way and as many times as you wish;
They're the best option to create a colorful contrast against the wall or your other more traditional tiles, or even to accent a specific part of the room that only allows for a small number of rows, such as the wall behind your sink;
Decorative tile murals: they consist of accent tiles that must be arranged in a specific order to create a bigger picture;
These murals can help you fill your barest walls and, although they can come in smaller sizes, they're usually better suited for larger rooms and bathrooms that don't already feature lots of other attention-grabbing patterns.