Huge Capacity: Each clear sleeve page stores 2 paintings back-to-back. With 30 pages, this diamond painting storage book keeps up to 60 finished or in-progress projects organized, flat, and dust-free. Perfect for collectors and artists. A3 Size: Fits Standard 16x12 inch Diamond Paintings Sleeve size: 17.3" x 12.8" (44 x 32.5cm). Designed to perfectly fit most 30x40cm (12x16 inch) diamond art canvases. Helps flatten curled paintings naturally. Heavy-Duty Waterproof Protection: Made from high-quality polypropylene material – strong, sturdy, waterproof, splash-proof, and dust-resistant. Provides long-term protection for your precious artwork, photos, or documents. No more worries about moisture or wear. Display & Share Like a Photo Album: Flip through pages to show your collection to friends, family, or customers. Perfect for craft fairs, art exhibitions, or simply changing up your home decor. Swap out framed pieces easily without damaging the originals. Multi-Purpose Portfolio Binder: Not just for diamond painting – also great for storing report sheets, photos, children's artwork, stickers, blueprints, and business presentations. A versatile storage solution for home, school, or office.