Standard Ream: A ream of A4 paper typically contains 500 sheets, though smaller packs with 100 or 250 sheets are also available.
Bulk Packaging: For wholesale or office supplies, A4 paper is often sold in boxes containing 5 or 10 reams (2,500 or 5,000 sheets).
Size: A4 paper measures 210 mm x 297 mm (8.27 inches x 11.69 inches), as per the international ISO 216 standard.
Aspect Ratio: The aspect ratio of A4 paper is 1:√2, which allows for easy scaling to other paper sizes in the A-series without altering content proportions.