This delightful birthday card set includes a 3D pop-up card, a matching envelope, and a blank note insert for personalized messages. The main card measures 20 cm x 15 cm (7.87 x 5.91 inches) and features a vibrant three-tiered cake with a candle on top, surrounded by cheerful decorations like balloons, stars, and lollipops. The HAPPY BIRTHDAY message is boldly displayed in colorful letters both on the pop-up and the printed front cover. A dark blue envelope (21 cm x 16 cm / 8.27 x 6.3 inches) adds elegance and protection, making it gift-ready. Included is a blank insert (13 cm x 8.5 cm / 5.12 x 3.35 inches) with a gold envelope icon, perfect for writing heartfelt wishes without interfering with the cards design. The coordinated set ensures a complete and polished presentation for birthdays of all ages. With its sturdy build and festive flair, this card set is ideal for gifting, displaying, or adding a touch of celebration to any special day.