There are no marking on these needles, however I have measured their diameter with a digital caliper.
Blue - 4.75 mm ( x4) Rose - 3.15 mm (x3) Gold - 3.00 mm (x4) Green - 2.71 mm (x4) Light Green - 3.17 mm (x1) Light Pink - 2.87 mm (x1) Purple - 2.70 mm (x1) Silver - 2.87 mm (x3) White - 2.40 mm ( plastic)(x1) Green - 2.70 mm (plastic) (x1)