Patchwork/ geometric print t-shirt | black/ purple/ gray | 3X

A mystery shirt with no tags whatsoever! My guess is it's entirely polyester. The front panel is a smooth non stretchy material, with a patchwork print (just a print, not real patchwork). The back of the shirt is a stretchy t-shirt material, as are the sleeves. Main colours in the pattern are a light purple, shades of gray, white and black. 3X is my best guess for sizing but please see measurements. EUC. ptp 26" bottom sweep 28.5" length 32"