E Z Line is flat, not round. I measure it at .002" thick and .005" wide. If it's twisted (and it's hard not to twist it), that shows. It just might be a good thing for banding steel, though. It's 3/8" wide, in HO. Seems kinda narrow.
Also, the "rust" color fades to a clear green with a few hours of sunlight. It seems to take permanent marker well, though, as a repair.
I am in the middle of using it to make a barbed wire fence about 5' long. It's probably the only thing to use if you're trying to recreate a fence in good order, where the lines are still taut. For my fence, I SUSPECT the twist in the E Z Line will not be noticeable unless you know to look. I do, and I can see it.