H. A. Kidd 24" (60 cm) Circular Knitting Needle (Nylon Cables) size 13 (9 mm) - Walmart.com
BOYE Balene II, Size 13 Circular Knitting Needles, 29 inches - Chappy's Fiber Arts and Crafts
Amazon.com: 32"Size 13 (9mm) Circular Knitting Needle for Beginners, Stainless Steel Circle Knitting Needles with Fixed Lace Cord, Round Metal Knitting Needles with Magic Loop for Sock, Blankets, Sweater, Gloves
Knitting Needle Sizes and Conversion Chart (Free Printable) - Sheep and Stitch