It's strange that my w42 bikilas are just perfect and really longer than these w42 spyridon MRs. I've managed to make it not hurting in one day, bit it's still really tight. I've tried to strech the big toe overnight with a hairbrush and other things inside. Also a hair drier to warm up the rubber and it seems that it's slowly getting longer the bikila is still some mm's longer but i think this will be a good shoe once it loosen a bit (which i hope) and it need some more streching too. I also have an M41 Kso which is the very same size as this w42 bikilas also needs streching it's maybe a little bit wider than the w42 spyridon mr but the length is the same.
I thing these spyridon mr's runs smaller.
Aaha, now i see that size chart and on that, the Spyridons really run 1 size smaller the chart on the vibram site is different (http://us.vibram.com/on/demandware.static/-/Sites-VibramUS-Library/default/dwc35ecf5e/images/Vibram_AdultSizingChart_Update.png)