Thank you SkA! I didn’t knew it means up to 255, I thought from 255 up to the next size. Now I order the 7.5 US calmly.Mondo point boot sizing is done in increments of 5 mm. Hence you need 255, which is intended for sizes of 251 - 255. This should work nicely for both your feet. How this translates into US size is something you should look up at the manufacturer, and looking at Sizing, you can see that size 7.5 US is 255 mondo. Meaning up to (including) 255 mm (starting from 251).
A size 7.5 US would be the correct fit for you.
You helped a lot, thanks for the answers 🤙🏻I'm no expert, so I'm not sure I can be of much help. Based on Union sizing it should fit. That being said you're on the upper limit of the S binding size, so it might end up that a M size would be a better fit - but I guess you'll see, if you can't fit it into a size S? I've got a pair of Rome Katanas which I bought before switching from oversized normal width boots to a smaller wide model and I ended up using my original M/L binding size with a 7.5 US boot, which seem to work fine.
The Rome specs are kind of similar: 7.5 and 8 are the upper limit for the S size binding, but they clearly state that it depends on the boot style and if unsure, size up to M/L.
