Palmaira sandals what's the sizing like?

[Naughtysausage]

I've fallen in love with these, I'm not entirely sure it's sensible. I haven't seen them in the flesh (so to speak) and I can't try them on. Delivery isn't free and returns aren't either.

I'm a size 5.5 and they don't do half sizes. Has anyone brought from them before and how did they fit?