These sponges have a white scrubbing side for removing tough grout haze. The scrubbing side of these sponges is bonded to the same material used for the Hydra Sponges. The reticulated foam of these sponges means they are super absorbent, clean easier and dry faster. Sponges have rounded corners and edges to prevent grout loss when wiping across joints. Sponge measures 4-1/4" Wide x 6-1/2" Long x 2-1/2"