New without tags super good looking architectural pleated funnel neck A line midi dress, hem is longer in the front than the back, and cut with points as shown in the last 3 photos.
Definitely I. Miyake inspired, done in sophisticated neutral colors of black, 2 tones of gray, and cream.

Fabric tag reads 100% polyester-made in China, there is no size tag even though I listed it as O/S or one size, Chinese cuts run small, and according to the measurements below it will fit up to a large, possibly XL, the sleeve pleats greatly expand to your arm size, and will fit most.

Following are the flat,  relaxed, external measurements, some of which are doubled.

Bust-pit to pit-42"     Waist Area-52"    Hip Area-63"     Bottom Sweep-82"     Length-36 to 40 1/2"