Van Gogh glass is approximately 1/8" thick and suitable for indoor use only. Our stained glass tiles are all hand cut so sizes are approximate and will vary slightly. To ensure availability and color consistency, please be sure to order enough of each color to complete your project. Some glass colors and traits vary slightly from sheet to sheet so the appearance may vary on future orders. If you'd like to view any glass in person before starting your project, samples are available here. (Sample page will open in a new window.) Thank you for shopping at Mosaic Tile Mania. We appreciate your business!