Can some of you Gravti owners comment on the 640 last and if you would recommend the same size as I wear in the 500 last? I'm so tempted to purchase a pair of monk straps I saw in 8.5M, but don't know if I would wear the same size in the 640 vs the 500.
As Rider wrote, 640 has a bit more room in the toe and at the ball of the foot than 500. I wear a 10M in both lasts. The shoes that I posted pictures of are made on the 655 last, which is very similar to the 500, only with a more elongated toe. If you're looking for a round-toe last, I've seen the 486, which I'm told fits similarly to the 500; and the 433, which from its description seems to be closer in fit to the 640. And if you're looking for a really long snout, try the 669. There are several other lasts that Gravati uses, but I don't know enough about them to comment.