Posted By:
warshawlawI only collect these cards in lower grades (I prefer a slightly worked card when it comes to old time cards)hence with a good deal of hard to fake corner wear, and my experience has been that they are the same size as T206, within a 1/16" margin. I have had several SGC graded and all were graded without question.
I know you probably know this, but I will say it anyway. Unless the card is trimmed on all sides, take the card outside in the daylight (but not in direct sun) and face north (northern light is preferred by artists for giving the truest colors) and review the edges for variations in shading under a magnifier. I have found this to be nearly foolproof in IDing alterations.