Gloomhaven fit facts before checkout.
What size sleeves do I need for Gloomhaven?
Gloomhaven uses two card sizes: 727 standard cards at 63.5x88mm, which take regular 66x91mm sleeves, and 975 small cards at roughly 44x68mm, which take 45x68mm mini sleeves. That's 1,702 cards total if you sleeve the whole beast. The small size covers the attack modifier and item-style cards you shuffle constantly, so if you only buy one size, buy the minis.
How many sleeves do I need for Frosthaven?
Frosthaven has 2,344 cards: 841 standard cards at 63.5x88mm and 1,503 small cards at roughly 44x67mm. That means about nine 100-count packs of 45x68mm mini sleeves for the small cards. Most players sleeve in stages — modifier decks and character cards first, everything else as it unlocks — rather than doing all 2,344 in one sitting.
Is a box organizer worth it for Gloomhaven or Frosthaven?
Yes — for these two games specifically, an organizer is the single best accessory you can buy. Gloomhaven packs over 1,700 cards plus a mountain of monster standees and tokens into a box that weighs north of 20 pounds, and without an insert, setup and teardown can eat 20-plus minutes of every session. A good organizer with monster trays and per-character tuckboxes cuts that to a few minutes, which matters a lot in a campaign you'll play dozens of times.
Which Gloomhaven cards should I sleeve first?
Sleeve the attack modifier decks first — they get shuffled more than anything else in the box and wear out fastest. Each character runs a 20-card base modifier deck that gets riffled every single scenario, and the monster modifier deck takes the same beating. After that, do your character's ability cards, since you handle those every turn; the item, event, and scenario cards can wait until they show wear.
Should I buy premium Gloomhaven & Frosthaven accessories immediately?
No. Let repeated play expose the actual problem: worn cards, unclear public zones, unsafe transport, slow setup, or difficult retrieval. Premium products should solve one of those jobs.
Are these exact product links?
Yes. Every retail button on this aisle points to a direct Amazon ASIN with Puzzlewick affiliate tagging. Prices and availability can change at checkout.