Each pack contains 5 cards. The set contains 56 cards:
Yu-Gi-Oh! - 25th Anniversary Rarity Collection II - Booster Box
Yu-Gi-Oh! - 25th Anniversary Rarity Collection II - Booster Pack
Yu-Gi-Oh! - Battles of Legend: Chapter 1
Yu-Gi-Oh! - Phantom Nightmare - Booster Pack
Yu-Gi-Oh! - Structure Deck - The Crimson King