This bamboo bracelet is cast solid sterling. 1/4" wide and 6 1/2" end to end plus a gap of 1". The weight is 1 ounce or 28 grams. You can see the file marks on the inside, but the surface is smooth. It is a studio piece and is not signed but it was tested with acid as sterling. It is not flexible. I have been a fan of bamboo jewelry ever since I lived in a house with a stand of bamboo outside my bedroom window and watched a shoot grow to 4 feet in one day.