What you will need:

• 9mm crochet hook
• 300-500 yards of worsted weight yarn
• Removable stitch marker
• Scissors
• Measuring tape
• Tapestry needle

Stitch Abbreviations:

BOR- Beginning of Round
YO- Yarn Over
CH- Chain
ST(S)- Stitch(es)
SS- Slip Stitch
ESS- Extended Slip Stitch: YO, insert hook into ST, YO and draw up a loop and SS through first loop, YO, draw through remaining 2 loops.

A video tutorial of this stitch can be found here:

https://youtu.be/oAS9Q8d9BbI

Note:
This pattern can be adjusted to accommodate any weight yarn by sizing up your hook 3-4 sizes from the recommended size on the yarn package.