Need US 5 (3.75 mm) set of DPNs with the angora yarn and US 7 (4.5mm) set of DPNs with the alpaca yarn.
From the book, “Fingerless mittens are very handy for anyone who works in the cold, and these two show what a difference the yarn makes! The angora version is quite luxurious and feminine; the alpaca version is just as luxurious in feel but more utilitarian in looks. Both are comfy and warm. The two mitts are worked the same way, but at a different gauge and on different size needles.”