Our Extra Large Box Set Outer Sleeves (330 × 51 mm) are designed to protect some of the largest vinyl box sets in your collection. Made from crystal-clear 3 mil cast polypropylene (CPP), these sleeves provide excellent visibility while helping shield your albums from dust, scuffs, shelf wear, and everyday handling. The generous 51 mm gusset easily accommodates oversized box sets and deluxe editions, while the block bottom construction expands evenly for a clean, professional fit. Whether you're storing thick multi-LP collections or premium collector's sets, these sleeves offer durable, archival-safe protection without sacrificing clarity. Tired of sleeves that don't fit, tear easily, or have awkward corners? Our block bottom box set sleeves are designed to fit properly and display your collection beautifully. For optional closure, we recommend using our semi-permanent stickers, which keep the sleeve securely closed while remaining easy to remove when needed.
