This stunning blouse has been made from a peice of soft brown damask fabric
(Damask is a reversible patterned fabric formed by weaving. Damasks are woven with one warp yarn and one weft yarn, usually with the pattern in warp-faced satin weave and the ground in weft-faced or sateen weave.)
The trim is vintage cotton a woven trim.
Free size, the front at 21inches long is shorter than the back.
it measures 56inches around the body from under arm at smallest point. 
Arm measures 20inches around the top of the arm.
I think this would fit well up to a size 16.
My Model is a Size 12
34’ bust
Height 5.4