Planning a mermaid-themed birthday party? These WUAWN invitations are absolutely magical and will set the perfect tone for your underwater celebration! You get 20 complete invitation sets, each including a beautifully designed card and matching envelope. The 4x6 inch size gives you plenty of space to write all the important party details while still being standard enough for easy mailing. The cardstock is thick and sturdy - no flimsy paper here - so they feel premium and hold up well in the mail. The glittery mermaid design features this gorgeous 'Splish Splash' theme with advanced printing that makes the colors pop and the glitter elements actually sparkle in the light. Each envelope comes with adhesive tape already on the back, making sealing them super easy and ensuring your invitations arrive looking perfect. They work for both boys and girls' mermaid parties, teen celebrations, or younger kids who are obsessed with all things underwater. The fill-in format means you can customize them with your specific party details, time, location, and RSVP information. They're way more affordable than custom printed invitations but look just as professional and special. Whether you're hosting a pool party, beach celebration, or just a magical mermaid-themed gathering at home, these invitations will get everyone excited about the big day. The set comes with exactly 20, which is perfect for most birthday party guest lists, and the envelopes are quality enough that you don't have to worry about them tearing during mailing. Definitely a stress-free solution for busy parents planning that perfect mermaid birthday!