This is a tape-sealed OPP bag. It's sized to perfectly fit B4 paper (257mm x 364mm, twice the size of B5). It has high transparency, allowing the contents to be seen clearly. It can be used for shipping items on flea market apps, preventing dust and dirt during storage, and for wrapping presents. It uses anti-static tape. *We will lightly fold it in half for shipping. Due to the size, it cannot be shipped with other items. *If you wish to change to Mercari delivery: We will accept it for "+100 yen" on top of the listed price. Please be sure to contact us in the comment section before purchasing. 【Thickness】0.03mm 【Size】Width 270mm x Length 380mm + 40mm 【Quantity】100 sheets This is the same as crystal packs and clear packs. Type: OPP bag