This is a large Triton's trumpet shell that has been processed so that it can be blown. It has been cleaned thoroughly. Being large, the volume is also extremely loud. I don't have anything to accurately measure the weight, so the figures aren't exact, but it's probably around 3.5 to 4 kg. The length is approximately 60 cm at its longest point. The circumference is about 70 cm. *Please forgive any slight errors. I don't think you'll find a Triton's trumpet shell this large very often. Thank you for your interest.