PRO "Takumi" Circular Knitting Needle 24in. No. 1.5 (2.5mm) – Clover Needlecraft, Inc.
Knitting Needle Sizes and Conversion Chart (Free Printable) - Sheep and Stitch
KnitPro Zing Fixed Circular Needles, Length 25 cm (thickness 2.00 - 5.00 mm) – Leo Hobby
SHARP Steel Circular Knitting Needle 2.25mm 40 - $11.50 : Stranded In Oz Shop!, Hand-Painted Yarns / Wool in Unique Colours and Original Knitting Designs