No, you just can’t a bar based on specs. I’ve got a set of 3T bars and Easton, they are different sizes despite being the same basic size. I also think there are more “sizes” than sizes.
So the width with vary by around 2cm mfg to mfg; the curve radius of the drops will impact where your shifters sit at, etc. They also don’t list how the drop feels as they angle up, far the drops really flare out and how far they extend backwards.
Even if you’re not into aero bars, ergo bars and aero bars have a better ride quality. I think they feel better because they spread the load out when you rest your hands there.
FWIW Pro, Prime, Trek makes a cheap aero bar - https://www.trekbikes.com/us/en_US/equipment/cycling-components/bike-handlebars-accessories/bike-handlebars/road-bike-handlebars/bontrager-elite-aero-vr-cf-road-handlebar/p/23238/?colorCode=black
Like shoes, you’ve got to order 3-4 bars and send the losers back.