stone stairs 1.material: granite, marble, travertine, slate, sandstone 2.Color: grey, red, yellow, green, black etc Our steps, stairs, risers and treads are various in color and dimension either. Material could be in granite, marble, travertine, slate, sandstone etc. We have our own standard as following, but your own design is also welcomed. Steps and risers: 110~270x30~33x3cm or custom ...