I'm knitting swatches of Malabrigo worsted yarn to plan my next sweater for me. I tried knitting it on my standard US 8 needles then tried knitting on US 7 needles to compare the fabrics. I'm going to wash them and block them to see which one I like more.
I really need to convert the needle sizes from US sizing to metric. It is much more precise to think of things in mm instead of US.