You can make the game window larger (or smaller) to get larger (or smaller) cards; or you can select a card size from the sizes listed in the Décor > Card Size menu.
Resizing the WindowThe cards in the game window automatically adjust their size to the window’s size. If you change the window size, the cards will change size to match.
Using the Décor menuIf you would rather select a card size than a window size, choose a size from the Décor > Card Size menu. The menu offers six different card sizes ranging from Itsy to Huge.
When you choose a card size, the game window will also change size to fit the cards.