SFGate

AMN Square can be made to look modern too, but rectangular ones lend themselves to a modern look more easily. Grout lines are another important part of the equation. To get a more modern look, go with very thin or no (if possible, depending on the tile and the installation parameters) grout lines.

ASVInteriors Both. Enter " modern square tiles" in houzz to see how effective they can be. Large is better than small.

Dytecture I agree with the size and design of the tiles are the deciding factors rather than their shapes.

Arlene Warda, Architecture+Interior Design I think both. Square is considered a 'grid'. Anything that is a 'grid' is considered modern. like the post by Dytecture above. Rectangular is nice too, staggered. It is a little less formal than the grid. So, you decide, formal or informal?...