Gather balloons in your chosen colors and sizes
Gather a balloon pump
Gather balloon decorating strip or fishing line
Gather glue dots or balloon tape
Gather scissors
Inflate balloons to varying sizes
Tie off each balloon
Sort balloons by color and size
Attach balloons to the decorating strip or line
Alternate balloon sizes and colors for fullness
Fill gaps with smaller balloons
Secure loose balloons with glue dots or tape
Shape the arch by bending the strip or line
Anchor both ends of the arch securely
Trim any excess strip or line
Check the arch for even spacing and adjust as needed