I did it!
I trimmed a pocket and got a beautiful Thoth mini. The cards are about 2 and 5/8 by 1 and 3/4 inches--smaller than a LS mini, but not postage stamp size! I can't get over how good they look--and the BACKS are beautiful, too!
I used a rolling blade paper cutter and a corner punch. The cards aren't totally even, but I can live it. I'll just have to be careful when I cut the deck! The deck is now in my tote bag in its cute little red and black velvet bag, and is officially my ultimate carry deck!
When my year-long study is over at the summer solstice (and I won't need the cards on my altar any more) my large Thoth is getting the same treatment! I have to remember to get a new blade for my paper cutter.
I'm racking my brain, but I can't think of any others of my decks that "need" to be trimmed, but maybe I'll look through my collection over the weekend . . .