The vest is called Lila Vest Top. It is cute with an oversized loose fit. This beautiful vest works up fast and uses an easy lacy stitch. It is a 4 row repeat. It is made from 2 rectangles, with no shaping needed.
There are 2 versions- the cardigan vest with the open front, and the vest top with a closed front that has a V neck. The pattern has positive ease and is available in plus size.

Pattern details:

1) It has written instructions for the crochet pattern and detailed pattern row by row notes with pictures.
2) Pattern has schematics, chart and over 15 pictures.
3) It can be made in any similar yarn suitable for your hook.
4) A YouTube tutorial is available and linked in pattern.