Happy Birthday Mermaid Foil Balloon – 18 Inches

Dive into birthday mode. This 18-inch Happy Birthday mermaid foil balloon brings underwater magic to any celebration — vivid, detailed, and the perfect anchor piece for mermaid-themed birthdays that want to make a real splash.

• 18-inch mermaid design with Happy Birthday lettering — magical and immediately eye-catching
• Helium-filled and ready to float on arrival — float time 3–5 days indoors
• Built for mermaid birthdays, under-the-sea parties, and ocean-themed celebrations
• Delivery in 11201 · Pickup available in Dumbo, Brooklyn

Build the full under-the-sea party with our Mermaid Balloon Set and Mermaid Tail Balloon Set. Add a pink number balloon for the birthday age.

Frequently Asked Questions

What size is this balloon?
18 inches — a great accent size for mermaid party bouquets and tabletop arrangements.

Is this balloon helium-filled?
Yes — arrives inflated with helium and ready to float.

How long will it float?
Foil balloons float 3–5 days indoors. Keep away from heat and AC vents for best results.

What other mermaid balloons do you carry?
We've got the full ocean: Mermaid Balloon Set and Mermaid Tail Balloon Set.

Do you deliver mermaid balloons in Brooklyn?
Yes — We offer delivery to 11201. Pickup also available in Dumbo, Brooklyn.