Approximately 15cm x approximately 10.5cm size. Includes 100 sheets of release paper (separator). It's unclear whether the release paper is double-sided or single-sided... There's a glossy side and a non-glossy side, so I think it's probably single-sided, but please judge from the photos or purchase only if you don't mind either type. Since it has been opened and taken out, there may be wrinkles or folds. Thank you for looking.