MEASUREMENTS: Hat Circumferenceis 21". Yarn: Stitch Nation by Debbie Stoller “Bamboo Ewe” x 1 ball - 5910 Lipstick Circular Knitting Needles: 3.75mm [US 5] 16" and 5mm [US 8] 16". 1 Set Double Pointed Needles 5mm [US 8]. GAUGE: 20 sts = 4"; 24 rows = 4" in pattern stitch using larger needles. CHECK YOUR GAUGE. Use any size needles to obtain the gauge. NOTES: Hat is worked in the round. As stitches are decreased and no longer fit on circular needles, divide them among 3 double pointed needles to complete.