Following the Book of Changes, every card can turn into another, with Yin solidifying into Yang, and Yang melting into Yin. The cards offer a powerful visualization of the I Ching concept, a useful and practical way to consult the ancient book. Text by the American I Ching expert and writer Lunaea Weatherstone.Included: 64 cards.Cards size: 8.8 x 12.5 cm (3.4" x 4.9"). Weight of the deck: 310 g. (approx).Includes instruction booklet (in English).Plastic coated paper playing cards.New, sealed. Made in Italy.100% authentic, original  product.