Just as a reference point, size 8 UK = about a size 10 US (my size) I'm sure you can google that info, but I'm speaking from experience. I'm from the U.S. now living in UK. many mainstream stores that arent in shoe only sales are carrying up to a 9 UK-11US these days, hence why many cant find a big variety in the bigger sizes than that, if you don't mind splurging a little extra and your shoe size is beyond those I mentioned try Shoe stores that carry a big variety and range of styles and sizes, or maybe specialty stores like long tall sally, they focus mostly on tall women's clothes, and although bigger feet don't always go hand in hand with being taller, they carry some cute styles of shoes from size 7 UK up to like a 11uk (about 9-13 U.S.) they have both a UK and us site.