100 pieces of felt, enough for 88 notes plus extras. Approx dimensions 1/2" outside diameter, 1/8" inside diameter, .130" thick white woven felt.   They are excellent quality and medium thin. I've been a piano technician 30+ years and am glad to answer any questions you have about this item, before or after the sale.  My contact info is included in each shipment and you can also reach me through eBay.