From the Knit Picks Website:
Here’s a pretty little bag to hold your yarn ball when youKnit In Public! It’s a lacy circle, knit in the round, then cinched up with drawstrings that also function as straps. It will fit a 100-gram ball of yarn perfectly!

Knit Picks pdf modified September 20, 2011

Yarn: 1 ball Knit Picks CotLin DK yarn
Needles: US7 DPNs and 18-in circular
Crochet Hooks: Sizes 5 and 8

Recommended: Emily Ocker’s circle cast-on with smaller crochet hook (photo tutorial provided).

Project is roughly hexagon-shaped before ties are added to eyelet row. Ties are chained with larger crochet hook.

Pattern is written and charted.