I'm a pretty firm believer that everything is a compromise. Please don't ask me how that discussion went when my spouse wanted to talk about our "being perfect for each other"

My shoulder's outside to outside are 17" or 43.1 cm. And as I stated earlier the bars I rode for over five years where 38 cm. I also believe my previous bike of 35 plus years was in the 38 cm ballpark too. But I don't have it to measure.