Thx for everyone's opinion. Yeah, I was talking about the actual 9 card holder sleeves to place my 1200+ cards in a binder for storage. Not particularly fond of keeping them in square cut outs in mage wars box. I do use ultra pro covers for my mages and their abilities cards, since there are no extras for those. It fits perfectly, and I can easily slide them in and out of spellbook. I just wasn't quite sure about the actual 9 card holder binder sleeves.