It looks like a coordinated two-piece set (often called a matching set or co-ord set).

Name : It looks like a coordinated two-piece set (often called a matching set or co-ord set).

Top Fabric : Wool

Bottom Fabric : Wool

Sleeve Length : Sleeveless

Net Quantity (N) : 1

Sizes :  

S (Top Bust Size : 34 in, Top Length Size: 24 in, Top Hip Size: 35 in, Bottom Waist Size: 28 in, Bottom Hip Size: 37 in, Bottom Length Size: 34 in)

M (Top Bust Size : 36 in, Top Length Size: 24 in, Top Hip Size: 37 in, Bottom Waist Size: 30 in, Bottom Hip Size: 39 in, Bottom Length Size: 34 in)

L (Top Bust Size : 38 in, Top Length Size: 25 in, Top Hip Size: 39 in, Bottom Waist Size: 32 in, Bottom Hip Size: 41 in, Bottom Length Size: 35 in)

XL (Top Bust Size : 40 in, Top Length Size: 26 in, Top Hip Size: 41 in, Bottom Waist Size: 34 in, Bottom Hip Size: 43 in, Bottom Length Size: 36 in)

XXL (Top Bust Size : 42 in, Top Length Size: 26 in, Top Hip Size: 43 in, Bottom Waist Size: 36 in, Bottom Hip Size: 45 in, Bottom Length Size: 36 in)

Top layer : A sleeveless crochet/knit long vest or duster with a black-and-white zigzag pattern

Inner top : A black bandeau/crop top

Bottom : High-waisted wide-leg knit pants in the same black-and-white zigzag pattern

How it’s usually described in fashion terms :  

“Black & white crochet co-ord set”

“Knit vest and wide-leg pants set”

“Boho or resort-style matching set”

If you want, I can help you :  

Find a similar set online

Style it differently (shoes, accessories, layering)

Figure out what occasion it works best for (casual, party, vacation)

Country of Origin : India