Set of 4 glass materials in various colors, perfect for glass crafts. Size: approximately 155 x 300mm. Thickness: approximately 3mm. There are cutter marks, magic marker marks, and sticker residue. Due to the nature of the item, we cannot offer a guarantee or exchange if it breaks during shipping. Please only proceed with the transaction if you are okay with this, as you will be using it broken. We will ship using cushioning material and recycled cardboard boxes.