Wholesale Prices in Price Matrix. Inside layer of the shell is polished showing a rainbow of colors and the outside is natural. #1 grade. Average length - 4" x width 3" x 1" Deep. For Tripod stand, see Display Case & Stands - The 4" tripod stand works great with these shells. Makes great ceremonial smudge bowl for burning smudge sticks such as sweet grass, sage, incense and cones. These abalone bowls are period correct for different reenactors time periods, free-trapper craft projects and living history events. Great item revolving around reenactment events, Civil War, Rendezvous, Pirate, Renaissance, Medieval, Pow Wow, Living History and Cowboy).