large piece is marked marfil 16.4 foot2. it has at least 38x42" working area.medium piece has at least 12x65" working areasmall piece has at least 8x28" working area I didn't see any ounce rating, but it is all about an 1/8" thick This listing is for the item described above. Check pics for details. Check listings for more items. Will combine shipping when possible. Local pickup available Payments must be made within 3 days of auction end. Most items will be shipped within 3 business days of cleared payment. Friday evening through Sunday is not a business day. We ship to only to Continental USA. You will receive tracking information as soon as the item is shipped. WE DO NOT SHIP INTERNATIONALLY NO PERSONAL/BUSINESS CHECKS.By bidding on the item, the Bidder agrees:Bidder will make the payment within 3 days after winning the auction. Item will be relisted if buyer does not pay within 7 days. Seller reserves the right to cancel the bid.