DIY Balloon Mosaic Letter

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by Kristina Domitrovich // photo by Lindsay Pace

This giant letter filled with fun balloons is the perfect back drop to any bachelorette party, bridal shower or rehearsal dinner (and it’s a fun photo area, too!).


  • 8 20×30-inch white foam boards
  • 100 balloons in varying colors, more or less as desired
  • 1 precision knife, like an X-Acto knife
  • White duct tape
  • Glue sticks and glue gun
  • Clear glue dots
  • Pencil or pen
  • Clear tape
  • Scissors

The details you need to know:

  • The couple’s last name
  • The wedding color palette


  1. Lay four foam boards in a quadrant on a flat surface; it should measure 40×60 inches.
  2. Use Adobe Acrobat to print a capitalized letter as a poster, inputting 40×60 inches as the poster’s size. This will print the letter across on multiple standard pieces of paper.
  3. Use tape to connect the letter, then cut the letter out with scissors. Make sure the base of the letter is flat, so it will stand properly on the ground.
  4. Use a pencil to trace the letter onto the foam boards. Cut out the traced letter using the precision knife.
  5. Duct tape the letter together on both sides where the pieces meet.
  6. Cut the remaining foam boards into 4 long strips, so each piece measures 5×30 inches — these pieces will be the siding.
  7. Begin hot gluing the strips along the sides of the letter, until all the edges have been outlined. For curves, use the precision knife to cut scores in the strip (only going halfway through) every 1/2 inch, to allow flexibility. Hot glue where two pieces of siding meet.
  8. Once the letter is completed, attach the remaining board to the bottom of the letter for added sturdiness when standing upright.
  9. Begin blowing up the balloons at varying sizes, but none exceeding 5 inches in diameter.
  10. Without gluing, fill the letter with the larger balloons and rearrange as needed. Then glue each one, using glue dots.
  11. Use the smaller balloons to fill the gaps, and secure with glue dots. Repeat until filled as desired, and the backboard of the letter is not showing.
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