The Tiny Universal Waite Tarot is one of the smallest decks I've ever seen - with 78 cards that are just 2 x 3.5cm. They're a little too small to shuffle and are best drawn from a bag for a reading, or just used as tarot decorations.
Mary Hanson-Roberts Tarot Deck - 78 Cards - US Games 1999
Name: Tiny Universal Waite Tarot Creators:
Mary Hanson-Roberts Publisher: US Games 1999 Deck Type: Tarot Deck Cards: 78 Major Arcana: 22 Minor Arcana: 56 Deck Tradition: Rider-Waite-Smith Minor Arcana Style: RWS-Based Scenes The Fool is 0 Strength is 8 Justice is 11
Card Size: 0.79 x 1.38 in. = 2.00cm x 3.50cm Card Language: English Card Back: Reversible