They simply print it on the card, and make it pretty easy to pick these out from the Standard sets, if you know what to look for
Jumbo cards range from 5.2 7.3 to 5.7 8.1 , depending on the version
Booster boxes have appreciated steadily, but single packs are still widely available
Each Disney Lorcana set so far has played host to at least 12 Secret Rares, so there will always be at least a dozen cards that go beyond the designated number of cards in each set
Identifying Lutri as a card that will literally be ubiquitious in decks that have blue or red Commander identities, the card was near-immediately banned in Commander
I got the inspiration from lgilmon's MTG Deck Box, and tried to create a similar in openscad: The box can be used as card tray: It have background graphics inside the tray In the scad you can customize: card sizes (if you use protector and/or use larger deck layer height ( for one color