CDU YGO Legendary Duelists Booster - Rules of Play says:
Each booster Pack of Legendary Duelists comes with 5 cards. Each booster Box of Legendary Duelists comes with 36 Packs.
Joey Wheeler’s Red-Eyes Armory! Even the mighty Red-Eyes B. Dragon can use a boost sometimes!
Mai Valentine’s Amazoness Warriors! Mai’s “Amazoness” monsters excel at all things combat!
Mako Tsunami’s Ocean Mastery! You’ve seen The Legendary Fisherman and The Legendary Fisherman III. Now, the missing generation in the family will be revealed!