Originally Posted by Leon

It's an interesting observation but I am not sure the marks have to do with the size of that space at bottom. I think I have seen the marks on all sizes of caramels (even at bottom)....would need to do some research to conclude it...
I sort of hate to show this one for the one million and twenty second time, but has registration marks and pretty big borders especially at bottom, if this is what you are alluding to?