Amazon.com: ChiaoGoo Red Lace Circular 47 inch (119cm) Stainless Steel Knitting Needle Size US 6 (4mm) 7047-6
4mm Long Bamboo Knitting Needles (35cm) | Stitch & Story
Amazon.com: ChiaoGoo Red Lace Circular 16-inch (40cm) Stainless Steel Knitting Needle; Size US 6 (4mm) 7016-6
Amazon.com: Prym 6" Double Point, US 6 (4mm) Knitting Needles, Alabaster White 5 Count
Amazon.com: Mdoker 13.8 Inch Aluminum Knitting Needles,Colored Straight Single Pointed Metal Sweater Knitting Needle for DIY Knitting Projects,Size US 6(4mm)
All About Needle Sizes
Amazon.com: ChiaoGoo Circular 40 inch (102cm) Bamboo Dark Patina Knitting Needle Size US 6 (4mm) 2040-6