Made from approximately 10mm thick cedar wood. It's the one marked Ⓓ in the 6th and 7th photos. It only has a 4cm slit. You can check if you can ship a Yu-Packet Post package just by passing it through the slit. I made this to offer it at a low price, hoping that as many people as possible would use it. The frame material is thinner. There are absolutely no problems with accuracy or strength. It's lightweight and I think it's even easier to use. Thanks to nearly 1,000 people who have purchased it, I can now make better products at a lower price. I also have a more durable version for sale. If you want a more durable one, please purchase that one. The photos are for size and shape reference. The item to be shipped will be the same. This item was created from the need I felt as a Mercari user. I believe you will be satisfied with this product. Wood is flexible, strong, and polishes with use, making it environmentally friendly. Above all, the texture of the wood is the best. I have received many comments saying they were surprised by its durability and good feel. I have also been using it for many years. I will use recycled packaging materials. If you purchase multiple items and they can be shipped together, I will reduce the price by the shipping cost. We may change between Yu-Yu Mercari Delivery and Raku-Raku Mercari Delivery without notice. Thank you for your understanding. #TakawataHandmade #TakawataPackingScale #YuPacketPost4cm #YuPacketPost #ThicknessMeasurementRuler #ThicknessMeasurementGauge #ThicknessMeasurementItem #ThicknessMeasurementGoods Yu-Packet Post Thickness Measurement Gauge 4cm Thickness Measurement Ruler Scale Yu-Packet Plus Measurement Ruler Mercari Shipping Mercari Scale Shipping Ruler Thickness Measurement Ruler Thickness Measurement Item Thickness Measurement Goods Thickness Measurement Scale