Disregard measurement request. Dealer buddy of mine stopped by & I had this on screen. Its a deco wall shade mounted flush against a wall used in movie theaters in the 30s & 40s for patrons walking into the dark theater. He has seen them before, exact same as yours, star shape edge, moon & star pattern ball set into a metal star shaped holder using interior clips. Again it was mounted flush against the wall.
I should add this though...we found a pair on ebay of the hanging type, same star edge, same globe with same pattern only the edge was drilled in two places for the two handing rods as they were the theater lobby ceiling type...he laughed at the price...roughly 10X what they normally sell for at architectural & renovation salvage operations open to the public. Normally values are not given here, however he did say its a $90-$100 shade at retail so not bad at all. Ken