A Beginner's Guide to Circular Knitting Needle Sizes - Sintelli
Knitting needle and crochet hook size charts - Studio Koekoek | sustainable craft kits and supplies
US size 6 (4mm) Circular Knitting Needles | Stitch & Story
Knitting needle sizes & Conversion chart [+ recommentation for beginners]
16 inch US Size 6 /4mm Stainless Steel Circular Knitting Needles Set for Beginners, Round Metal Knitting Needles with Fixed Lace, Circle Needle for Small Knit Projects Socks, Hats, Christmas Stockings :
Lykke Driftwood Single Point Knitting Needles US#6 (4mm) 10"