the perfect heel ?

LoL I keep swearing that I am going to wear what they call wedding sneakers and be very comfy.. lol but I know my aunt would have a conniption about it so I want to go with flats.. I found ones I like ( I wore the same shoe for my friends wedding where I was a bridesmaid). FH is not that much taller than me and I refuse to be uncomfortable for the whole day. Knowing my aunt she'll want to get me something with a bit of a heel so idk .. maybe wear what she wants for the ceremony and then switch.

Here's the pic of the shoes I am thinking about- they're actually from David's Bridal and they're flats.