The Dominaria United Collector Booster Box contains 12 Dominaria United Collector Boosters and 1 Traditional Foil Box Topper card.

Each Collector Booster contains 15 Magic: The Gathering cards and 1 Traditional Foil double-sided token, with a combination of 5–6 cards of rarity Rare or higher and 4–5 Uncommon, 4 Common, and 1 Land cards, with a total of 10–13 foil cards. Foil Borderless Mythic Rare Planeswalker in 2% of boosters. A Lost Legends card (from the 1994 set, Legends) replaces a Common in 3% of boosters.