MUK LUKS Levi Shoes

I have never seen a shoe description showing the width in inches; it’s always been Narrow, Medium or Wide. The size 12 has a width of 4.19". If that’s the widest point of the sole, I have to presume that’s a Narrow, compared to the shoes I now own. (And that’s a shame; I really like the Levi’s model.) Can anyone provide further enlightenment?

I bought a pair of Muk Luks from Woot. Not this model, but similar. They run small (and narrow).