1.Step(outside) / Stair(inside) 1) size: 110-150 x 30-33 (cm) 2) Finishes: A) top polished/top polished with anti-slip line, with edges bevelled and polished b) top flamed /bushhammered/sandblasted with anti-slip line, others with edges bevelled and polished. 2. Riser 1) size: 110-150 x 14-15 (cm) 2) Finishes: Top polished, others sawn cut. Other sizes are available upon your request 3. Thickness: 1.5cm, 2cm, 3cm 4. Material: Natural marble, sandstone or granite