A few of us in my mum group went through this and we all agreed that comfort really has to come first, especially in the later months when your feet swell up. I personally loved wearing supportive sandals that had good arch support because standing or walking for even a short while can really tire you out. One of my mum friends also reminded me to avoid anything with a hard or rigid sole since your feet need room to breathe and flex throughout the day. Getting something soft and flexible made such a difference for me during my third trimester lah.