This is the latest version of a convenient measuring ruler for calculating shipping costs. It is a measuring ruler with three types of frames (approximately A4 size). The material used is lightweight plastic corrugated cardboard (white), which is more resistant to cracking than styrene board. Thickness is approximately 4mm. The following three thicknesses can be measured: 1cm - Regular Mail 2cm - Smart Letter 3.0cm - Non-standard size (within the standard) Yu-mail Click Post Letter Pack Light Nekopos Yuyu Mercari Bin Yu-packet 【1cm, 2cm, and 3cm are also common for Yu-packet】 ★ Furthermore, a very convenient shipping cost table is listed at the bottom. For price revisions after July 2022, we will apply stickers on top. This is a handmade product, so please understand that there may be slight errors or cut marks from the cutter. If you are looking for perfection, please refrain from purchasing. (^o^) ★☆★☆ ＜Shipping Method＞ ★☆★☆ ● Non-standard size mail (free) The product will be placed in a vinyl bag and then sent in an envelope. (We cannot provide packaging due to shipping costs.) If you are concerned about folding during shipping, please consider the following: For those who want simple packaging, please consider the following: ● Click Post (can be changed for an additional 100 yen) Shipped in an envelope with cardboard for simple packaging. Tracking is also available. (Recommended) (This cannot be changed after purchase) If you wish to use Click Post, please write "Click Post desired" in the question box, and we will change the price.