Multicolor Patterned Blazer with Black Trim

Multicolored blazer with silky gold interior and black trim. It's from Goldwyn clothing (made in New Zealand) but doesn't have a size — I'd estimate small or medium but please check the flat measurements below. Pit to pit: ~19 inches Shoulder to bottom hem: ~26 inches Arm width: ~6 inches Arm length: ~19 inches