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JohnSteve I was measuring a PSA type holder, which is slightly smaller than the standard 1/4, 1/2 and 1" bricks of my youth etc... If you’re really interested and the above wasn’t an attempt at sarcasm.
I looked into this whole measurement thing quite sometime ago regarding my T206's being graded. 4 SGC cards equal just about an inch and about 5 for PSA's . Space was big concern as I more than likely couldn’t fit them in the box once graded.....