You will need a set of double pointed needles in each size.

Clarification: The gauge is measured on size US 2.5 (3.0 mm) needles. This is the size also required for main part of the design. (There is a tiny typo that could be confusing.)

Yarn used:
Rowan Summerlite 4 Ply
Shade 418 Washed Linen - 1 ball