Visit manufacturer websites to search for tile you like, but always order samples before buying, as colors and finishes look different in person. Some stores let you borrow samples overnight for free, or you can buy them online for a nominal fee. Prop samples against the wall you plan to cover to see how the tile looks with your decor and lighting.
Some tile makers sell directly to consumers via their websites or dedicated showrooms. Others will refer you to kitchen and bath showrooms or third-party online sites, such as southcypress.com. Home centers sell some tile at stores but put many more of their offerings online.
Made-to-order tile, especially pricey lines, can take weeks to arrive. So make your selections well in advance if the tile's installation is time-sensitive.