I haven't updated my 'comfy' casual sandals yet but I'm looking at a pair of Vionic and Flipflops.

I was hoping to add a pair of white sandals but I've tried several pair and they are all too wide and I don't have a narrow foot.

When I had plantar fasciitis my feet were most comfortable in Dansko, Naots, or Mephisto sandals. I was on my feet a lot at the time and these were the only sandals I could wear all day. Hope this helps.