Reversible black and white stripe button up top/shirt/jacket and flattering minimalist pants from Susans, designer in Berkeley, CA.
The jacket features a double layer falling collar, three square shell buttons, 3.5" slits on the side seams, and white contrast stitching, as well as contrast fabric on the front closure and on the back of the sleeves.
The reversible side is the same fabric as the pants, with three square black buttons.
The sleeves have an asymmetrical slit at the cuff, and look stylish when turned back to show the reversible fabric.
The pants are minimalist, mainly straight but shaped at the bottom with darts (see photos). Hidden back zipper, flat front, and darts from waist for fit.
Really flattering, slimming two piece set, easy to wear, comfortable and doesn't crease. 

The fabric is 46% viscose, 42% cotton, 8% wool and 4% lycra. Feels like a cross between jersey and suiting fabric. Soft, easy to wear and comfortable. Dry clean only.

Preowned, but in excellent condition, with no obvious signs of wear, and from a smoke free home.

Labelled size XS but runs big. See measurements below (with garments laid flat).

Jacket - armpit to armpit  19.5"
             shoulder to shoulder  15.5"
             sleeve (shoulder to cuff)  23"
             length (nape to hem)  25.5"

Pants - waist  15"
             hips  20"
             inseam 27.5"
             outseam 39.5"
             width at hem  9"

Please let me know if you have any questions.