Standard Bars

Standard barbells have 1" diameter ends, including straight bars, tricep bars, curl bars and everything else. The middle (the part you grip) and the ends (the part you load weight plates on) are basically the same diameter.

Note that some of the lower priced olympic plates have the words "standard barbell" embossed on their face, even though they have 2" diameter holes. If that's what you're looking for, see the category.