The Merola Tile Pebblini Mini Olive 12-1/4-inch x 12-1/4-inch x 5 mm Pebble Stone Mosaic Tile offers a naturally beautiful look for any design setting. These miniature natural grey and olive green pebbles come mounted on mesh in an interlocking sheet, making for seamless installation when done properly. Each mosaic features randomly ordered pebbles evoking a Zen-like environment and can be used as a cohesive look or paired with other tiles. Being as these are constructed of natural stone, they are durable and frost resistant, making them great for interior / exterior use, including kitchens, bathrooms and backsplashes. These highly skid-resistant tiles are excellent for wet environments such as showers. When installing these tiles on the wall, you do not need grout. When installing this tile on the floor, be sure to use grout sparingly, as too much grout could cover the shapes of the stones. Do not allow grout to dry in places that you do not want it, as it will be difficult to remove.