Thank you for the quick replies. Ideally, a C width would be great for me as the Poron takes up a little bit of space in the shoe.
Here is a comparison of the B vs. D. The B fits great aside from just a tiny bit of pinching on my right pinky toe. I was thinking the CXL will be able to stretch pretty well. The D width fits well in the toes/instep, but a little too much room in the heels. No heel sleep, but you can see the space on the edge.
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The D is definitely too wide for you. The amount of bowing on the sides is indicative of that. Your feet will likely sink into the Poron very nicely, and should eliminate the pinky pinch (depending on the severity of it). I'm not sure if a C width would be perfect - it might still be too wide, but if the pinky is really tight in there you might want to consider it.