They hold standard US Letter paper — 8.5 x 11 inches (listed as “Letter Size” in the product details).
Most listings show a two-pocket configuration — Number of Pockets: 2.
Sheet capacity varies by model — listings show capacities from about 25 sheets up to 100 sheets.
Typical overall dimensions are approximately 11.5 inches by 9.3–9.5 inches, based on the product listings.
They’re sold both as single folders and in multi-packs — common pack sizes include 6, 10, and 12 units.
Center prongs secure punched pages by locking them onto the fastener; some folders also include stay-put corner tabs so you can tuck page corners in for extra hold.