This is a vintage cut corner rectangular wire frame for making a tailored soft bodied lampshade. 
Base 14 x 9 1/2”
Height 9 1/2”
Top diameter 7” x 5”
Duplex fitting (for use with shade carrier which isn’t included). I would suggest an 5”/6” carrier.
Note that this is a vintage but unused frame. It does have some scuffs etc but no flaking or rusting.