While the review of Dec 19 is helpful in that indicates the widths of Zipp bars are measured Outside-Outside (BackCo take note: specs like this simply MUST be included in the item listing itself), the rest of the listing is incorrect.

The de-facto industry standard for handlebar widths is Center-to-Center in centimeters. While some manufacturers such as Zipp measure Outside-to-Outside, there is NO SUCH THING as nominal handlebar widths measured Inside-to-Inside.

Why does this matter? Because an Easton bar with a nominal 42cm C-C width will be the same width as a Zipp bar with a nominal width of 44.5cm O-O.

While nominal widths are a good starting point, the only surefire way to make sure you are getting the width you need is with actual measurements.

As for the Nov 20 review by a 220 lb "clydesdale" who rides an Orbea Orca and is concerned with stiffness: keep this fact in mind: the ORCA is one of the flexiest carbon frames ever made, especially at the head tube junction.
I've ridden the bike, and the type of bar is almost irrelevant: so much flex comes from the frame and fork steerer, steering will never be precise, especially for a larger rider.
A rider this heavy shouldn't be on a frameset that soft, and probably shouldn't be on a 185g carbon bar either, for that matter.
Cum grano salis, indeed.

FYI these are measured differently then most of the other road bars. (the ones on the bike, not roadside bars :-P) These are measured outside to outside, not inside to inside like most other road bars.

Great looking and feeling bar. I picked up the pro bend version of this bar for my Orbea Orca and love it. It flexes a little more than I would like when I crank hard out of the saddle, but I'm 220 lbs so take that with a grain of salt.
Overall a very sexy bar.