Standard dimension: Random slab, Gangsaw slab: 60~90cmup x free length, 48"-60"up x 96"-110"up, 4'up x 8'up (1200~1850 x 2400~2900mm), Other sizes are available upon request 2. Popular thickness: 20mm & 30mm 3. Surface finish: Polished, flamed & honed 4. Common Packing: Lined with plastic film, then in strong wooden bundles. 5. Quality Control: Polished degree: Above 85 degree Thickness Tolerance: +-1mm for 2cm slab