... :1.Color: grey, white, black, yellow, green, red, brown and etc.; 2.Standard Size: Step,100-150x33cm, Riser,100-150x17cm, other sizes ... are available upon request; 3. Normal thickness: 2cm, 3cm and ect.; 4 ... , paving stone, curbstone, monument, etc Granite step stone stairs with high quality and low price