This pattern is written for using Magic Loop method.
Step by step instructions explain how to start with Magic loop.

Very quick and easy with Chunky weight yarn.
The blue sample is knitted with Malabrigo Mecha.
Women’s S size -- used total 0.7 skein.
Pink ones are knitted with left over yarn. Worsted weight yarns are doubled. The gauge became a bit bigger than suggested gauge. Please check here for more details about the yarn and size.

You need only one 32” or 36” long circular needles. 40” also works, but I felt the cord is a bit too long. Please take time to check the gauge. The gauge is 16sts / 4”.
Mittens are knitted tighter than suggested gauge with smaller needles. I used US #9.