Spikey

Pleaser have just re-arranged their sizings and now they come in UK half-sizes. It used to be the case that you had to go a size bigger but I think they have done this to compensate. For example, your generous size 8 would be a US size 11, but that equates to UK 8.5, so this removes the uncertainty a little.

Hollywood Heels are sticking with full sizes but they do vary somewhat especially in the width, which makes a surprising difference to the fit.
As everyone has said, theres no substitute for trying them on.