I'm not sure that can be right. I've got Bont Riot size 49. Their size chart says the 49s are 320mm (last length) and to allow 2-4mm longer for your feet. They fit my feet perfectly.
The Sidi Genius 52s I've got are about 1.5-2cm too long for my feet. The Sidi Eagle 50s I've got fit me fine, but could possibly do with being a little wider at the toes.
There's a huge difference, seriously. I seem to recall it being almost an inch. Basically tried them on, LOLed at how massive they were then put them back in the box and chucked them in a cupboard (I'd got them sent to my parents and didn't visit until it was too late to return them).
I'm not sure that can be right. I've got Bont Riot size 49. Their size chart says the 49s are 320mm (last length) and to allow 2-4mm longer for your feet. They fit my feet perfectly.
The Sidi Genius 52s I've got are about 1.5-2cm too long for my feet. The Sidi Eagle 50s I've got fit me fine, but could possibly do with being a little wider at the toes.