listing is for 1 6' piece of 16oz (24g) copper corner mouding. It measures 1 1/8" x 1 1/8" with both sides hemmed over. It also comes as an inside corner or and outside corner as shown in photo 1, just specify in the notes which one you would want. The end of each piece is notched for sliding pieces together for a nice fit as shown in pic 5 . I put this in my home and people always comment on how nice it looks, plus it was easy to install. You can use construction adhesive such as liquid nails, or you can use small copper nails, When using nails you would want to drill a small pilot hole 1st. I make this in 6' lengths because any larger than that the shipping would be outrageous . the notch is 1" long so if you were to put 2 pieces together you would get a total length of 11' 11". If you are interested in any other size, just email me and I can get you a quote. Thanks for your interest!