Bikkuriman Sleeve Collection Sleeve We also offer 50 to 500 sheets in separate listings. If you need more than that, please leave a comment. Storage bag for 52mm square, for protecting collection stickers. These are hard sleeves, not soft, so they provide even stronger protection against scratches on the main body. I've made various types, but this thickness was just right. If they were thinner, they would feel flimsy, and if they were thicker, the transparency would be compromised, so this is where I settled. Many people have asked about refills, so I will include that information. For refills, please search for "R YSV-BDH81 Pocket Refill". I use them too! ^ ^ There are two types: 20 pockets and 12 pockets. The 20-pocket is for 42mm square, and the 12-pocket is for 52mm square. (For single-sleeved stickers) The 20-pocket can hold 240 stickers, and the 12-pocket can hold 144 stickers. I store my old Bikkuriman stickers in double sleeves and Bikkuriman 2000 stickers in single sleeves, using the same refill size. For old Bikkuriman stickers, I think the 12-pocket is better for arrangement. There are various types of refills, some where the stickers fall out easily if turned upside down, and some that are thin and flimsy. I believe the YSV-BDH81 refills are the best. These are made in Japan, but please understand that there may be slight dimensional errors due to machine specifications. Shipping Mercari delivery, simple packaging. Target Product BM Forever 52mm square stickers Thank you very much m(__)m