The classic postcard size - 148×105 mm - format that fits perfectly in mailboxes and collectors' albums. Thick 300 g cardstock - ensures excellent stiffness, durability, and a premium feel in hand. Glossy finish - enhances colors and brings every detail to life. High-resolution printing - sharp details and vibrant color reproduction. Writable back side - smooth surface that works beautifully with most pens and markers. 5 address lines on the reverse side - plenty of space to fit any address clearly and neatly. Perfect for mailing or gifting - durable thickness ensures they travel safely. Collector-friendly - ideal for Postcrossing, scrapbooking, framing, or themed collections. Eco-conscious production - FSC-certified paper and responsible printing methods.