Its supposed to be 18" in diameter with 1/4" thickness. Created the file in Inventor and then converted to a .stl file for upload to get a pricing estimate. New to Inventor as well so the thin walls is a design error.

Long story short. Looking to print dome shaped object 18" in diameter with 1/4" thickness, and 3 clips that extend out as fasteners. Drawing I attached only has 1 of the 3 clips. Looking to get a ballpark cost est but then ran into the max dimensions error which I need to resolve so I can get a cost est.

Google says airspeed velocity of an unladen swallow is 31-40mph