Stained glass sheet glass. I don't know the details. There are also images with light shining through, so please check the photos. The size can be confirmed with the ruler in the image, so please check it yourself. I would be troubled if I received a negative review after purchase because the size felt different. Please note that there may be markings from a marker, scratches, or tape attached. Approximately 94 grams, 3 mm thick. Please use it for making small items. Items that have been listed for two weeks will be cut and sold as scraps, so please purchase any glass you like as soon as possible. Shipping will be via Click Post. I will pack it carefully, but there is a possibility of breakage during transportation. Especially when purchasing multiple items, they will be packed together, making them more prone to breaking. There is no guarantee for breakage, so if you wish to have it shipped as fragile, we will change to Takkyubin (home delivery service) and add shipping costs. Please contact us before purchasing. Please note that we will use recycled materials such as newspapers and cardboard for packaging. We will pack the item upon completion of payment, so we cannot accept requests for combined shipping or changes after that. For combined shipping, the limit is 3 sheets (or 4 sheets if they are small) per package. Discounts will be applied from the second sheet per package. We have set the shipping time to 4-6 days, but we will ship as soon as it is ready. If the weight is within 1 kg including packaging materials, we will ship via Click Post; if it is within 2 kg, we will ship via Yu-packet Post.