A4 size, compatible with 30-hole and 2-hole files ⚠️27 sheets I have used a few, so I counted them, but there may be errors in the number of sheets. I have used a few (I put trading cards in them). I will check and clean them during packaging, but there may be dust, etc. I am also selling other refills, so I can combine them. (Shipping cost reduction possible ⭕️) Packaging method OPP bag with tape → Cardboard → Brown envelope