Navy Lace

The "lace" which is applied to the sleeves of the uniform is used to denote rank, not because anyone onboard a ship would not know the rank of a person having spent a good deal of time at sea together. It is mainly for those ashore to see and know.  Below is a variety of sizes of Navy lace. It has a specific pattern of two lines that run the length, inset from each edge.

Navy Lace: 2", 1", 7/16" and 1/4"

I have found only one reliable supplier of Navy lace, La Lame in New York City. I think they still have a website, but the easiest way to deal with ordering is to call them. They are nice and prompt to do business with. The regulations call for 3/4" but 1" will do. Sometimes, you can only do so much....