They fit your regular 3 x 4 cards, meaning you can fit them in loose, or in sleeves (which we reccomend)
The set includes everything you need for your first Pokmon battle, two pre-built mini-decks with 17 cards each, two playmats, a large metallic Pokmon coin, a rulebook, as well as a damage score sheet and six prize tiles
But it also has a very wonky ability that basically translates to every planeswalker loyalty ability costing 1 less point to activate, which means walkers go positive on 0 abilities, or stay neutral on -1 abilities
Furthermore, the detailed and artistic design of the cards is a highlight that makes this set particularly desirable
I always try to keep the name given by the card's designer so when I have to change a card's type I usually adapt the name to fit) Twiddlywinker 3U Creature Human Wizard 1/4 When CARDNAME comes into play, Scry 1, scry 2, scry 3