Height: 12 inches (about 30.5 cm). Check out the last photo to see the dimensions.Certificate of authenticity or any other kind of documents are not included. I managed to put these works together over the years with the help of the network that Ive created from my anthropological studies. Most of the pieces come from European private collections, and many have been part of my personal collection for some time. The item "32# Antique KACHINA Double Bird Helmet HOPI, Native American" is in sale since Thursday, November 8, 2018. This item is in the category "Antiques\Ethnographic\Native American". The seller is "rockwater2" and is located in Poznan. This item can be shipped worldwide.