Rhapsodielle small Geometric High Neck Romper or Swimwear

Pre-owned and in great condition. No size or material tag. The material feels almost like swimwear material. It could be polyester though. It is stretchy. It has the chest darts but it is not lined but I would wear it in the water if it was my size. The cut out back detail with the 2 black buttons is a really sweet detail on this piece. The high mock neck is classic. No size tag but looks like a size small or size 6. Approximate measurements: 14.5” across chest from pit to pit 28” length 2.5” inseam