Loeffler Randall Dahlia Size Advice

Looking to get a pair of the Loeffler Randall Dahlia shoes for my wedding next year but struggling to know what size to order! I have heard they run small.

I usually get a UK size 5 and have fairly narrow feet. Unsure whether a US size 7.5 or a US8 would be better if sizing up slightly?

Alternatively - anyone know a London stockist where I could try them on before buying?

Thank you!

they’re available on net a porter! they go in and out of stock but turn on notifications and then you can order and try x

I’m a size 37 and have a size 36.5. I’d go for your normal size x