Sidi tends to run narrow.

I have to order 2A (narrow) in my brooks running shoes, my feet are narrow with high arches. I have had some luck inserting superfeet inserts green insoles into my pearl izumi to take up some room and create higher arch support. Good luck.

My feet are very narrow (even Sidis are too wide), and the Specialized Zante's are perfect for me. I also use custom orthotics to make it a little more fitting to my foot.

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https://www.strava.com/athletes/10327392

Pearl Izumi cycling shoes are narrow and fit quite snug.

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Angela Naeth
http://www.angelanaeth.com
http://www.iracelikeagirl.com

Hi! Hope it's not too late. I personally have wide feet but I have a friend who has narrow feet and she uses Sidi. I think this is the most popular brand for narrow feet.

I also have narrow feet and I have Kswiss shoes. Like the durability of the leather. Also, love the fit, the feel and the lightweight of these shoes.