I can easily create several sizes on request.... Just ask. Many alternatives are possible: - Extended base which covers the complete Crop Circle. - A flat cover, closed or with Font Hill Crop Circle Geometry. - A flat cover with different Crop Circle Geometry. - A spherical cover (more or less a mirror of the bottom half) - A closed bowl with stand, but with an open (crop circle pierced holes) cover. - Different Sizes, different wall thickness.... - Etc.... In this version, a sphere/ball of 10 cm diameter will just fit into it. Model can be downloaded freely. I don't charge a personal fee for modeling work. If you wish additional changes I might be able to make a change on request. For questions, rewards, remarks, feedback, you can contact me @ firstname.lastname@example.org. If you printed one of my products in one of the materials, please send me some photo's or leanings. Be careful with selecting a material.