Gather supplies: balloons (primary colors + filler), balloon pump, balloon tape/strip, fishing line or clear monofilament (optional), scissors, command hooks or stands, weights or sandbags, measuring tape, marker
Choose balloon sizes and ratio (common): 11″ base balloons, 5″–9″ fillers; plan a mix (example: ~70% base, ~30% fillers)
Inflate balloons to consistent sizes
Create a “cluster” for each connection point:
Tie 2–3 base balloons together with balloon knot technique (or balloon tape method)
Add 1 filler balloon between clusters as needed
Prepare the balloon tape/strip:
Measure the arch width and height
Mark connection points along the tape
Attach balloons to the tape:
Tie each cluster to the balloon tape at the marked points
Keep spacing consistent for even curve
Build the arch frame:
Set up a curved frame (or use a flexible arch setup) and secure it
If no frame, use a line and attach points with hooks/weights
Form the arch:
Hang the assembled balloon strip(s) along the frame
Adjust spacing and curvature until it matches the arch shape
Fill gaps:
Add extra filler balloons where needed
Inflate a few extra balloons to quickly patch thin areas
Secure ends:
Tie the final clusters to the tape ends and secure to the frame/hook/weights
Check stability and alignment:
Ensure all knots are tight
Smooth the layout so balloons face outward and the curve is even
Display tips:
Keep balloons out of direct sun and heat if possible
Assemble as close to event time as practical
Use weights/anchors for any freestanding setup