Fly London sizing

[Bexels]

I'm eyeing up some sandals for work on Vinted. I'm between a 3 and a 4. I'm a 36 in a Next, but a 4 in a Clark's Mary Jane then a 36 in Dune. Any advice ?
Thanks so much

I wear Fly all the time, I wear a 7 and the fit is good. That said I wear a 7 in everything so don't notice variations with brands

I’m a 4.5 in Clarks and my Fly London boots are a very comfortable 4.

Normal to generous I would say. And v comfy!

I've just bought some Fly sandals and they fit my usual size.

I think I might risk a 3 ...

I'm a 4 and they are true to size for me