From the Pattern:

A lovely little shawl, with a fun to knit triangle point border. Worked from the center point up with increases on either side, in extremely squooshable garter stitch.

Each shawl will vary in size, per the knitter and total grams of each skein of yarn. Gauge is not at all critical. The sample in the photos measures 41.5” across its wingspan, and 17” from Cast On point to the center top of its wingspan.