​25pcs Birthday Invitation Set: Each party invitation card comes with a matching envelope, which is more than enough for your party needs. Appropriate Size: The party invitation measures are 4" X 6", enough space for you to write on. Premium Quality: Crafted from thick cardstock, our fill-in birthday party invitation cards are not only sturdy and durable but also easy to write on. Unique Design: With a double-sided design, exquisite patterns, and vibrant colors, these invitations exude a textured feel. The fill-in style ensures there's plenty of room for additional information. This cute design is perfect for creating memorable birthday party invitations!