Go by the fizik size chart. It worked for me. Get a model with the BOA. There's little arch in the shoe. There's a size chart here.
https://www.fizik.com/eu_en/tempo-overcurve-r5.html
My feet are not narrow. I took one look at them and thought that my foot would never fit into such a narrow looking shoe, but they did.
I could use more arch support. Sidi is better for arch support.