Without a size reference to demonstrate otherwise, Fourman110 is likely correct. Decorative lamp rings can be from a few inches across to a foot or more. We have an outdoor alcohol fueled lamp with an ornate brass ring about 11 inches in diameter. Typically made of sheet steel, copper, or brass, these pieces have been around in some form from the late Roman era. Yours is likely early 1900s.
Time for more coffee.