I have bought 5 pair of grizzly clogs through Amazon and loved all of them except the latest pair.  All of my orders have been for size 43, but this time the size 43 is so tight, after forcing myself to wear them for a week to "break them in" that I may have to toss them.  I left them in the box for a month while I stretched out having to throw my old pair away...I fear I have kept them too long to return them.  If they don't fit, return them right away...save yourelf the pain and $90.