I did a ton of research before buying these shoes. Which included trying them on in store. I usually wear between 9.5-10. So in store I tried both a UK 7 and 8. The 8 was enormous! The 7 felt cozy. And I know that once I've worn them in a bit they will stretch. These shoes run big. So if you wear a 9.5 I would say get the 7. A true US 10 may prefer the 8. Besides all the sizing questions these were exactly what I wanted. Make sure you distinguish between the weathered (W) and non weathered. The weathered have a waxy coat on them which gives them a more rugged appearance. I didn't care for those. I wanted straight black. In short amazing and much cheaper than in store. Every store I went to they retailed $159 pre-tax.