HI Oakleaf,
So, what the mizuno rep told you is sorta right and sorta wrong.Here's how it works in cycling shoes.
Let's start with say, a size 40 shoe. Suppose you have a men's medium width 40 & a women's medium width 40.
1) Both size 40s will be the same LENGTH.
2) The women's shoe will be a B width.
3) The men's shoe will be a D width. This is wider than the women's medium width in both the forefoot *and* the heel.
To my knowledge, there is no cycling shoe manufacturer making a women's wide cycling shoe.
However, let's go the other way. Let's compare a men's narrow 40 to a women's medium 40.
1) Both size 40s will be the same LENGTH.
2) The women's shoe will be a B width.
3) The men's shoe will *also* be a B width.
4) However, men's B width shoes typically have a wider heel cup than a women's B width shoe, as women tend to have narrower heels for any given length foot. Could potentially cause some heel slop/slippage unless you can cinch the shoe snugly.
5) For the same length (40) and width (B) the men's shoe will also have a greater overall foot *volume* in the middle of the shoe. What do I mean? Men generally have "thicker" feet through the arch/instep area (think top to bottom), just as they often have thicker palms (for example, Jeff & I have the same width hands, but looked at from the sides, his hands are clearly thicker than mine). So even though the shoe may be the same width, it'll be "taller" through the mid-foot area to account for the thicker foot. Again, if you have a shoe that is very adjustable and can be cinched down, or if you yourself have a thicker foot, this may well not be a problem for you.
Incidentally, some sock companies take this into consideration as well. A Smartwool "unisex" small sock is the same LENGTH as a "women's" small sock, but the foot VOLUME is greater in the unisex small. Most of the smartwool socks we carry are the women's version, which are sometimes hard to find elsewhere. Same with our Balega socks. Many many men can wear the "women's" smartwool socks without issue. Jeff wears the socks we carry all the time. For me, I prefer the women's because I have a small foot and like a snug fitting sock without extra fabric over the instep.
Sooooo, to get back to the Mizuno shoe. Could you wear the men's medium? Probably. It will be the same width in the forefoot as the women's wide. But it will likely have a wider heel cup and a greater foot volume in the midfoot. You'll have to try them out to see whether or not your heel walks out of the shoe.
Does this info help?



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