Great site - "4-in-1, or more specifically, european 4-in-1. This weave is what most people think of when they think "chainmail." The weave used for armor in olden days, and purses in the Victorian era. I like a pretty tight ring size for my 4-in-1 pieces. You may prefer slightly looser sizes, but these are a good place to start. The ring counts listed here assume that you're making a band five rows wide (as shown)."