This is a sample of Kokomo glass. 3.5 x 4.5 cm. I do not know the specifics of each piece of glass. Please use it for making small items. Shipping is set for 4-6 days, but we will ship as soon as it's ready. Shipping will be via Click Post. We will pack carefully, but there is a possibility of breakage during shipping. Especially when purchasing multiple items, they will be packed together, making them more prone to breaking. We do not offer compensation for breakage. If you would like fragile handling, we can change to Takkyubin (home delivery service) and add shipping costs, so please contact us before purchasing. Please note that we will use recycled materials such as newspapers and cardboard for packaging. We will pack the items upon payment completion, so we cannot accept requests for combined shipping or changes after that. The limit for combined shipping is 3 pieces (or 4 pieces if they are small) per package. We will offer a discount on the second item onwards per package.