Finished it last night, pictures later today. It’s very cute, but too small for “stout” me. Getting a slender model today.
At left is the vest after I sewed the 2 seams but before adding the pretty crocheted edging. You sew the bound-off edge to the cast-on edge (creating a tube basically, or as Weldon's says, "like a roller towel"), then sew a second seam across the top, leaving 5" on each end for armholes. It looks like a kite shape when the sewing is done and it's laid out flat. I was completely doubtful that those 2 seams were going to create any sort of garment, but voila! Weldon's strikes again with correct instructions and it is indeed a little bolero type shrug.
The Vest took exactly 3 skeins (550 yards) of Brown Sheep Nature Spun sport weight yarn.
I think I’m going to knit it again, maybe in worsted weight yarn, and see how it turns out size wise. The garter stitch strip was 46” which created a snug vest on me, so I’m going to try knitting a longer strip.