This is a sheet of glass for stained glass. I don't know the details. I also have an image with light shone on it, so please check the photos. The size is shown with a measuring tape in the image, so please check it yourself. I would be in trouble if you gave me a bad review saying the size was different after purchasing. Please understand that there may be magic marker writing, scratches, or tape attached. Approximately 123 grams, thickness 3 mm. Please use it for making small items. Items that have been listed for 2 weeks will be cut and sold as scrap, so please purchase glass you like as soon as possible. Shipping is via Click Post. I will pack it securely, but it may break during transport. This is especially true if you purchase multiple items, as they will be packed on top of each other and become more prone to breakage. There is no compensation for breakage, so if you wish to ship as a fragile item, please contact me before purchasing to arrange for a shipping upgrade to Takkyubin (delivery service) with additional shipping fees. Please note that I will use recycled materials such as newspapers and cardboard for packing. I will pack your order once payment is complete, so I cannot accept requests for combined shipping or changes after that. The maximum number of items per package is 3 (or 4 if they are small). Discounts will be applied from the second item onwards per package. I have set the shipping time to 4-6 days, but I ship as soon as it is ready. If the total weight including packing materials is within 1 kg, it will be shipped via Click Post. If it is within 2 kg, it will be shipped via Yu-Packet Post.