Black Gap winter coat with detachable hood size small

This is a black gap winter coat that is pre-owned, with barely any signs of wear. There is a small white stain on inner left side of the jacket but its entirely invisible on the outside of the jacket ! Im unsure if it is a small in mens or womens, but I presume it is a small in mens. Please refer to measurements !100% polyester collar to bottom 21 ½ | sleeve 32 | waist 23 | chest 23 Size Guide: Collar to Bottom: Back of garment collar (bottom stitching) to the very bottom of garment Sleeve: Center Back of bottom of collar, to end of sleeve)Waist (of shirt): Horizontal length of the most narrow part of shirt Chest: Horizontal Measurement of under armpit seam to under armpit seam ideal for everyday use. first-class materials and excellent craftsmanship ensure long-lasting durability.