What size in Nike running shoes?

[StillNoFuckingEyeDeer]

If you're a runner and wear Nike running shoes, how many sizes bigger than your normal shoes do you wear?
I have a Nike voucher to spend. I'm a 6-6.5 in regular shoes and a 7.5 in asics running shoes, so just wondering if anybody might be able to give me some idea what size I'd be in Nike?
Thanks.

I wear a size bigger.

I'm a 6 normally, and wear a 7 in both Nike (vomero) and Asics (dynaflyte)

I'm a 6.5 normally and a 7.5 in Nike (Pegasus). I need an 8 in some other running shoes though (ie Saucony)

Thank you all. I think 7.5 should be right.

If you are a runner you need to try the shoes on. A slight problem with fitting might lead to injury over time.

you need to try them on.
you need plenty of space between biggest toe and tip of shoe - at least a thumb width.
I usually wear a european 40, my current running shoes are size 42. no idea a out uk sizing.

I’m half a size up in Nike, I’m 8 normally but 8.5 in the Pegasus. With metcons though I find the sizes to be quite accurate so don’t size up in those.

Thanks, I know I need to try them on, but I only have the option of using the voucher online.