The Yarniad Patterns - Mielie Vest and Shibui Geometry Patterns - Parabola are both similar patterns: 18 (4.5 sts. / inch) finished gauge, adult tanks and vests garment, for women, and worsted (19-20 sts/4 in) yarn gauge.
You may enjoy taking a look at the Misti Alpaca Chunky Solids Cap Sleeve Cardigan Vest, and Knitting Pure and Simple #212 Turtleneck Shell kits all using Knitting Pure and Simple Summer Sweater Patterns.
Hopefully our suggested yarn options for 997 - Basic Shell can help you come up with your next exciting new project idea!
If you like Summer Sweater Patterns, then you may be interested in the different ways we've used them. Visit our Vest corner to see some ideas.