Interesting to look back on this thread after a couple of years of Jumbo slabs.
Added to the Master Set so far have been 31 Jumbo slab items with 3 in the red section.
Based on what I know PSA is grading, there are at least another 33 items left to be included in the Master for Jumbo's. 64 Jumbo's...
I think at least 7 or 8 more should be slabbed, but PSA isn't grading them at the moment.
A few more than some of us originally thought
I still have not figured out a great way to store them.
How many will there be when they start slabbing 11x17??