Your wife's foot and my foot are very similar (but she is 0.5-1 size larger depending on the shoe). My favorite swim fins are my Zoomers. It appears that finis dumped the blue/red models in place of a single model - gold. Based on the size chart, i think a size D would work well. I actually think mine are a size D as well (but I have the older models). I'll confirm when I swim after work.

Thanks so much. This will save me a lot of trouble. When you get a chance, please let me know what size you have. When you say size 'D', do you mean the womens 6.5-8.0 size?

Thanks again!

I am same size (37 cycling shoe, 6 or 6.5 run shoe) -- I use the TYR crossblades in orange (xs, or men's 3-5).

I wear the Speedo Optimus, size small, light grey/green.

I checked and my zoomers are a D.

Thanks for the help!