A nest with its eggs for your keychain. Its dimensions are :X: 24.3 mm.Y: 20.9 mm.Z: 14.0 mm.It is ready to print. I am sure of that and check it in blender. It has :Non-Manifold :0Intersections :0zero faces and edges: 0non_flat faces :0Thin faces :0Sharp edges: 0I tested in Cura, too, and everything is good.I hope when you print It not have any problem.