[Size] Each sheet is in size 11”X11”X3/8”. It covers approximately 0.84 SQFT. To cover 20 SQFT, we recommend you purchase 10% extra (26 sheets) for tile installation waste. [Sample program] Sample swatches are available and highly recommended. Natural stone varies in color, shade, and pattern etc. Current actual sample swatch should be obtained and inspected before committing add-on jobs or large orders. Limit one sample swatch per product per household. [Finish] This product is in polished finish. It is slippery resistant. All the nature stone mosaic product should be sealed after grouting. [Application] This product can be used in any interior and/or exterior (residential and commercial) project. The common applications include kitchen backsplash, bathroom shower wall or floor, pool surroundings, fountains, barbecue island, etc. [Craftsmanship] The mosaic stone tile is made by high quality marble from worldwide. Each piece passed strict inspection to ensure consistence on color, size and pattern.