There are many styles for you to choose from, and you can choose your favorite one. Designed with creative 3D birthday cake patterns, these greeting cards will bring you a stunning 3D visual effect when you open it. You can use these 3D greeting cards as a delicate birthday present for your friends, classmates and students, expressing your best wishes. It is constructed of paper material. The length of the envelope is 15.5cm and width is 13.5cm. This product is suitable for Christmas, home, household, birthday, holiday, etc. Item Name: Greeting Card Material: Paper Features: Eye-catching, Eco-friendly, No Odor, Wide Application Size Details: Fold Size: 15cm x 13cm/5.91" x 5.12" (Approx.) Unfolded Size: 15cm x 26cm/5.91" x 10.24" (Approx.) Envelope: 15.5cm x 13.5cm/6.1" x 5.31" (Approx.) Seal Sticker Diameter: 3cm/1.18" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Greeting Card 1 x Envelope 1 x Seal Sticker