Arguably the most extreme and exacting (and therefore desirable) grading for a card to get is Beckett's coveted 'Black Label' - which requires a perfect 10 on all four of the company's key metrics: surface, edges, corners, and centering
Wed recommend using both TCGPlayer and Collectr to keep an eye on things, and to check out other popular sets like Paldean Fates, too
Thickness of 1 Side (microns): Gamegenic Inner (50), Dragon Shield Dual Matte (120) 100 Double Sleeved Card Thickness (mm): Theoretical (64), Practical (68) Water Test: Pass Deck Box Fit (mm storage): Fit: 100 good
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A Japanese card is 59.9 86.1mm roughly 3mm narrower and 2mm shorter
House Cartographer House Cartographer is card advantage, even if that is restricted to lands