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
Ginger 10" Straight Knitting Needles US Size 13 – Hot Springs Fiber Co.
Amazon.com: Circular Knitting Needles Set Size 13 Interchangeable Aluminum Knitting Needles Circular 2.75mm-10mm with Case
US 13 Circular Needles – Knit Collage
Knitting Needle Sizes and Conversion Chart (Free Printable) - Sheep and Stitch