This is a vintage cut corner square wire frame for making a tailored soft bodied lampshade. 
Base 14”
Height 11”
Top diameter 7”
Duplex fitting (for use with shade carrier which isn’t included). Pictured on an 5” carrier but I would suggest a 6” carrier.
Note that this is a vintage but unused frame. It does have some scuffs etc but no flaking or rusting.