Source foil numbers and letters from established foil balloon makers through your regular balloon supplier, buy jumbo 24- and 36-inch latex from the same pro brands you use for garlands, and treat light-up marquee letters as a rental asset you buy or build only once the math shows they'll pay for themselves. Quality foil and good handling are what make numbers last through the event.
Here's how to choose between foil, jumbo latex, mosaic frames and marquee letters, how to make each one last, and the add-on and rental math so they earn money instead of collecting dust.
What are your options for balloon numbers and letters?
| Option | What it is | Best for | Watch out for |
|---|---|---|---|
| Foil numbers and letters | Mylar-style shapes, often around 16" or 34"–40" tall depending on maker | Birthdays, grab and go, quick add-ons | Overinflation, heat, sharp edges |
| Jumbo latex (24" and 36") | Big round latex balloons | Column toppers, statement accents, confetti balloons | More air or helium, more space in transport |
| Mosaic frames | Number or letter frames filled with small balloons | Photo-op pieces, high-ticket installs | Labor time, storage of frames |
| Marquee letters | Large light-up letters and numbers, usually rented out | Milestone birthdays, weddings, corporate | Upfront cost, storage, transport, power |
Most decorators start with foil and jumbo latex (low upfront cost, order per job) and add marquee letters later. Your regular supplier is usually the place to start; see where to buy balloons wholesale.
Where to buy foil numbers and letters that last
Many balloon suppliers carry foil from several established foil balloon manufacturers. Brands commonly carried include Anagram, Betallic, Qualatex and Northstar. Check which brands and sizes your supplier currently stocks.
What makes foil last at an event:
- Buy from known foil makers. Quality seams and valves matter more with foil than almost anything else.
- Don't overinflate. Fill until the shape is smooth and the seams look relaxed, not tight. Foil doesn't stretch like latex.
- Leave room for heat. Air and helium expand in warm conditions. A foil number filled tight in an air-conditioned studio can split in a hot car or in sun.
- Check the valve. Many foils have self-sealing valves; some decorators also heat-seal for extra security. Check the maker's instructions.
- Inflate with air for displays. Numbers on stands, in garlands or on backdrops don't need helium, and air-filled foil skips the float-time question entirely. (Cost comparison in helium or air.)
- Store flat, unopened, cool and dry. Creases and heat damage foil before you ever open it.
Helium-filled foil generally floats much longer than helium-filled latex, often several days or more, but it varies by size, maker and conditions. Don't promise a specific number of days.
36-inch and 24-inch toppers: sourcing and handling
Jumbo latex is a staple for column toppers, a big pop of color in a garland cluster, or confetti-filled statement balloons. The same professional latex brands you use for garlands (Gemar, Sempertex, Qualatex, Kalisan, Tuftex and others) make larger sizes, though which colors come in 24" and 36" varies by brand. Compare in best balloon brands for professional decor.
Handling tips:
- Size with a template or measuring tape, not by eye. Jumbo balloons look smaller up close than they read in photos.
- Inflate on site when transport space is tight. A pair of 36" balloons can fill the back seat. See how to transport balloon garlands.
- Watch heat even more. A bigger balloon holds more air to expand. Slightly under-inflate for warm venues.
- Order a spare. A popped 36" topper is very visible, and you can't hide it in a cluster.
If you're helium-filling jumbos, ask your gas supplier how much helium each size needs. A 36" takes many times what an 11" does, and that cost goes in the quote. Column and topper pricing is in how much to charge for balloon columns.
How to price foil numbers and toppers as add-ons
Every number, letter and topper is an add-on with a cost and a price.
Price = (item cost + fill cost + extra labor) ÷ (1 − margin)
Example: a 34" foil number, air-filled (made-up numbers, use your own):
- Foil number, landed (with shipping): $4.50
- Fill: air, effectively $0
- Labor: 5 minutes to inflate, seal and attach at $30/hour = $2.50
- Cost: $7.00
- At a 50% margin: $7.00 ÷ 0.5 = $14.00
Example: a helium-filled 36" latex topper:
- Balloon, landed: $3.00
- Helium: say $4.00 (from your own gas cost per balloon of this size)
- Hi-Float or similar treatment, ribbon, weight: $1.50
- Labor: 6 minutes = $3.00
- Cost: $11.50
- At 50%: $23.00
Clients usually understand "number add-on: $14" or "jumbo topper: $23 each." Popline's free price estimator does this math with your own costs, so add-ons stop being guesses.
Should you buy or build marquee letters?
Light-up marquee letters are a bigger investment than balloons, so treat them like rental inventory: buy or build only what pays back.
Your options:
- Buy finished letters from a marquee maker or prop supplier.
- Build from a DIY kit or your own frames.
- Hire a local fabricator (a sign shop or woodworker) to build a set.
Whichever you choose, check that lights and wiring are designed for repeated event use, and ask venues about their power and safety rules before you bring them in.
Marquee rental math: the break-even
Example (made-up numbers):
- Cost per letter or number (buy or build, including lights): $150
- Rental price per number per event: $45
- Per-use costs (transport time, cleaning, a replaced bulb now and then): say $10
- Net per rental: $45 − $10 = $35
- Break-even: $150 ÷ $35 ≈ 4.3 rentals per number
So each number pays for itself on its fifth booking. If you'll rent a "1" for first birthdays twice a month, that's under 3 months. If you'd rent a "7" twice a year, it's over 2 years.
Which marquee numbers to buy first
Don't buy 0 through 9 at once. Look at your last 6–12 months of inquiries. Most decorators find a few numbers come up again and again (first birthdays, milestone ages, graduation years). Buy those first, then add as demand shows up. Keep a simple tally:
| Number/letter | Times requested (last 6 months) |
|---|---|
| 1 | |
| 0 | |
| ... |
Also factor in storage. Marquee letters are bulky. If they push you toward renting a storage unit, read do you need a storage unit for a balloon business first. Store them covered, upright and dry so lights and finishes stay in good shape.
What to include in your number and letter policy
Put these in writing on your quote or agreement:
Foil numbers and letters are included as listed. Foil is sensitive to heat and sun, so we recommend keeping them out of direct sunlight and hot cars. Marquee letters are rentals and remain the property of [business]; they'll be picked up at [time]. Damage beyond normal wear is billed at replacement cost.
Have your agreement wording checked by a local attorney, since contract rules vary by state.
Sourcing checklist for numbers and letters
- Choose 1–2 foil makers your supplier carries; test a few before using them on jobs.
- Keep a small stock of the most-requested foil numbers (track what you sell).
- Order 24" and 36" in your core colors per job, plus a spare.
- Price every add-on with item + fill + labor, then margin.
- Track marquee requests for 6 months before buying.
- Do the break-even math on each marquee number before buying.
- Write a care and rental policy into your quotes.
Numbers and toppers are an easy add-on to show on a booking page, so clients pick them before they even message you. Popline's free Starter plan gives you a booking page at yourname.popline.io with an inquiry form and email alerts.
Frequently asked questions
Where do balloon decorators buy foil numbers?
Usually from the same balloon suppliers they buy latex from, many of which carry foil from established manufacturers such as Anagram, Betallic, Qualatex and Northstar. Check which brands and sizes your supplier currently stocks and test a few before using them on paid jobs.
How do you keep foil balloon numbers from popping?
Don't overinflate: fill until the shape is smooth but the seams aren't tight. Keep them out of hot cars and direct sun, since air and helium expand with heat. For displays on stands or in garlands, fill with air instead of helium.
Are marquee letters worth buying for a balloon business?
They can be, if they rent often. Divide the cost of each letter or number by what you net per rental to find your break-even. Start with the numbers your clients request most, based on your last 6 to 12 months of inquiries.
How much should I charge for a 36-inch balloon topper?
Add the balloon's landed cost, any helium and float treatment, ribbon or weight, and your labor, then apply your margin. With example costs of about $11.50 and a 50% margin, that's about $23 per topper. Use your own costs, since helium and balloon prices vary.