189
Orb rule
(beehaw.org)
Be sure to follow the rule before you head out.
Rule: You must post before you leave.
Well, the chapter 54: Snowball in Randall's book What If? 2 contains the following, semi-related graphic:
(Maximum diameters of spheres of various materials before collapsing under their weight, which is about the same as the material's free-hanging length)