Granite,Shanxi Black Granite Slabs Color: blackBig slabs: thickness 20/30 mm Small slabs: thickness 20/30 mm Tiles: 305x305x10mm, 300x600x10mm, Cut to size: 300x600x20mm, 600x600x15mm / 20mm/ 30mm ect. Others sizes of products are also accept as per your want Quality standard: Thickness tolerance: ± 1mm Finishing: polished, flamed, B-H, Honed, Flamed and brushed, Antiqued, etcWe supply thin stone tiles in standard size as below: 305 x 305 x 10mm (12" x 12" x 3/8"), 457 x 457 x 12mm (18" x 18" x 1/2"), 400 x 400 x 12mm (16" x 16" x 1/2"), 300 x 600 x 12mm (12" x 24" x 1/2"), 400 x 400 x 20mm (16" x 16" x 3/4"), 300 x 600 x 20mm (12" x 24" x 3/4"), 400 x 600 x 20mm (16" x 24" x 3/4"), 600 x 600 x 20mm (24" x 24" x 3/4") Wealso supply20mm and 30mm thickbig random slab. As the slab piece is cut from natural stone block, the actualslab sizeisdepended upondifferent stone characters(conditions) from different natural stone materials. However, we always try to ensure the largest slab size as possible. Weare available forany cut-to-size tile, panel, slab as per the specificrequirement of your architectural projects or commercial orders. Pls feel free to contact us if you are interested in our porduct.