Thank you for viewing! These are envelopes made from Yuzen Chiyogami paper. The size is approximately 3cm x 3cm. There may be slight variations in thickness depending on the paper used. As these are handmade, there may be some minor errors, distortions, or imperfections. Please understand. *The 4th and 6th images are almost actual size. *When a 500-yen coin is placed inside, it won't fall out even if the envelope is tilted. It's a perfect fit. ☆Orders and bulk purchases are welcome. ☆Instant purchase is OK. ☆To prevent any issues, please confirm any concerns through the images or comments before purchasing. ☆Shipping will be within 1-2 business days after purchase confirmation. The shipping method may be changed due to our circumstances.