A4 size, compatible with 30-hole and 4-hole files. ⚠️10 sheets I counted them, but there might be some errors in the number of sheets as I've used a few. Some sheets have been used (to hold trading cards). I will check and clean them during packaging, but there may be some dust. I'm also selling other refills, so you can combine them. (Shipping cost reduction possible ⭕️) Packaging: OPP bag with tape → Cardboard → Brown envelope