Not being able to get gauge on several sock patterns I decided it was time to buy some size 0(2.0 mm). Also needed different size ones. Didn't realize that my hiya hiya's are 2.25 and my knitpicks size one's are 2.50. So I bought some size 0's in various cable lengths and size 1/2.25. I really like knitpicks needles and they are way cheaper than addi's or hiya hiyas.