Marvel Champions: The Card Game is a cooperative deckbuilding game, not a traditional trading card game, but that does not mean its cards need special or hard-to-find sleeves.
The vast majority of the deck, encounter, and player cards across every Marvel Champions box use the exact same standard card size found in mainstream TCGs like Magic: The Gathering and Pokemon.
There is one notable exception worth knowing about before you order sleeves for a new expansion, since a small portion of the card pool uses a different, smaller format.
Here is the full breakdown of what to sleeve, what size to buy, and how this applies specifically to the new Shadowland Scenario Pack.
Standard Marvel Champions cards measure 63.5mm by 88mm, confirmed by sleeve-fit reference sites like sleeveyourgames.com and by Gamegenic-branded Marvel Champions sleeve kits sold on major retail listings. That is identical to the standard card size used across nearly every mainstream TCG, including Magic, Pokemon, and most Living Card Games from Fantasy Flight.
This is good news for anyone already stocking standard-size sleeves for other games: the same stock genuinely fits Marvel Champions cards without needing to special-order a game-specific sleeve line.
Not every card in the Marvel Champions ecosystem uses the standard size. A portion of the card pool, generally identity and status cards depending on the specific product, uses a smaller Mini American format measuring roughly 41mm by 63mm. Official Marvel Champions sleeve kits sold through third-party sleeve makers explicitly separate standard-size cards from this smaller mini-size batch within the same box.
Checking your specific box's card breakdown before ordering sleeves matters here, since assuming every card is standard size can leave you with a handful of mini-format cards that do not fit your main sleeve order.
The Shadowland Scenario Pack is an extra-large, 90-card box built almost entirely around encounter content: villain cards, treacheries, minions, side schemes, and the new trap deck used in Shadow Labyrinth. Based on the card types FFG has previewed so far, the overwhelming majority of this pack's content should fall into the standard 63.5x88mm category rather than the smaller identity-card format, since it contains no new playable hero requiring an identity card of its own.
That makes Shadowland a straightforward sleeving job for anyone who already has standard sleeves on hand for other Marvel Champions content or other TCGs entirely.
Encounter cards get shuffled, reshuffled, and reused far more often than a player's personal deck, since the same Shadowland villain pool gets reset between every attempt at Shadows in the Night. That repeated handling makes sleeve durability matter more here than it might for a hero deck you build once and rarely touch.
A clear, snug-fitting standard sleeve protects card edges from the wear that comes with constant reshuffling, which matters even more for a scenario pack designed to be replayed multiple times against its six possible Dark Protégés.
Shadow Labyrinth introduces a separate trap deck that functions outside the main encounter deck, and side decks like this tend to get handled individually and flipped through more than cards that stay shuffled into a larger pile. Sleeving these cards the same way as your main deck keeps wear consistent across the whole box rather than leaving one subset more worn than the rest.
Since the trap deck gets revealed card by card rather than dealt in bulk, individual card condition is more visible to players at the table, which is another reason to sleeve it alongside everything else rather than skip it to save time.
Once sleeved, keeping Shadowland's encounter sets organized by scenario rather than dumped into one undivided pile makes setup for a specific scenario much faster. A binder with clear 9-pocket pages lets you flip straight to the Ninja Swarm or Dark Protégé set you need without digging through the entire box.
This becomes especially useful if you are running the full three-scenario campaign in one sitting, since fast setup between scenarios keeps session momentum going instead of stalling on card sorting.
63.5mm by 88mm, the same as most mainstream TCGs.
No, some identity and status cards use a smaller Mini American format around 41mm by 63mm.
Based on its all-encounter content, the overwhelming majority of its cards should be standard size.
Yes, standard-size sleeves from other games fit Marvel Champions' standard-size cards.
Since the entire Shadowland Scenario Pack is overwhelmingly standard-size encounter content, a single sleeve order covers the whole box; stock up on perfect fit sleeves before your first playthrough.
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