I've ordered a Size US8.5, which is the size that I usually choose on my regular footwear, but, unfortunately, the Magnum boots arrived and was a little tight to fit. But despite that, if I were to get the correct fit, these Magnum boots are really comfortable! So, now I'm trying to sell off the boots and get myself a US9.0 size. Hopefully I will be able to sell off and get the size 9.0. Really comfortable and cant wait to get it! However, I've got no opportunity to test its waterproofing capability. Hopefully it works as mentioned in the Specs sheets.