My shoe size is Men's UK 8.5. According to Amazon's shoe sizing info chart on this product page, a UK 8.5 is a US 9.0.

Unfortunately, this is not true, because when I ordered and received these US 9.0 shoes, the size turned out to be only a UK 8.0, which I discovered only after wearing them for a round of golf (and finding them a bit tight). Obviously, the shoes are a tad uncomfortable, but as I have already used them, can't do anything about it...and just hope that they expand to some extent after a couple more rounds of golf.

However, I'd like to warn future buyers; please be aware - the shoe sizing chart on Amazon appears incorrect (I checked various other sizing charts online and it seems that a Men's UK 8.5 is, in fact, a US 9.5)! Had I known this earlier, and not gone by Amazon's sizing info, I would have ordered the US 9.5...