White chiffon blouse size 4? WHBM

Beautiful white coloured chiffon blouse. The size tag got removed but I think it's size 4 from White House Black Market. Good condition, with a few grey scuffs that I think can easily be washed off (see photos). I am 5'7.5" and usually wear size medium, or 4-6. This fits very well (see first few photos) Length (front): 25" Length (back): 32: Arm inseam: 18"