Sold by the 5/8" square,or a select few colors also available in 6x6 square. The Glass used for the Cut stained glass is Spectrum. I like to mix the opague with a little bit of transparent, some with one side iridized. I try very hard to keep them square and evenly shaped,measuring 5/8", but you may find an odd size here and there. Silvercoat Mirror Glass is a new addition to our online store, enjoy! PLEASE NOTE: Monitor settings may be different and affect the way colors appear on the screen. If you have any questions about color Please email us for information, we are happy to help. All Items Here are all the products in this category: • Spring Green Swirl Cut Stained Glass • Black Iridized Cut Stained Glass • Aqua Teal Swirl • Popcicle Orange Swirl • Purple Swirl Cut Stained Glass • Deep Red Swirl • Pink Swirl Cut Stained Glass • Cobalt Blue Iridized Cut stained Glass • Periwinkle Sky Blue Iridized Cut Stained Glass • Turquoise Swirl Cut stained Glass • Silvercoat Mirror Glass • Silver Mirror Tile Bits • Dichoric Glass Scrap • Van Gogh Cut Stained Glass Tile • Van Gogh Glass Tile Color Mix