Number foil balloons are the quickest way to put an age or milestone on show at a party. At Specialty Balloons we only stock 86cm number shape balloons, which is a big, photo-ready height that reads clearly across a room. They arrive uninflated and self-sealing, and you can fill them with helium or with air depending on how you want to display them. This guide covers how to choose colours, how to inflate and secure them, how to combine digits into an age, and how to look after them so they can be used again. You can browse our unprinted number shape foil balloons any time.
- We stock 86cm number shape balloons only: one size, one big look, in the colours listed on our number shapes page.
- Fill with helium for floating displays tied to a weight, or with air for walls, backdrops and displays that need to last longer.
- Plan your digits first: one balloon per digit, so 40 needs two, and 100 needs three.
- Fill helium numbers close to the event, keep them out of direct sun and away from heaters, and never release a foil balloon outdoors.
- Pair numbers with latex bunches or a garland, and add custom printed latex if you want a logo or message as well.
What foil number balloons are and when they work best
A foil number balloon is a large, flat-printed digit made from a metallic film, often called mylar. Most large number balloons are made this way and have a self-sealing valve, so you fill them and the valve closes itself. Guides to number balloons describe them as a staple for first birthdays, milestone birthdays, countdown photos and surprise parties.
In practice, the occasions we see them used for are broader than birthdays:
- First birthdays and children’s parties: a single bright digit behind the cake table.
- Milestone birthdays: 18th, 21st, 30th, 40th, 50th and beyond, where the age is the whole point of the party.
- Anniversaries and work milestones: years in business, years of service, a team goal reached.
- Photo moments: a pair of digits held or placed beside the guest of honour makes an instant photo prop.
Because each digit is its own balloon, you are not locked into a pre-printed message. You can show any age or number from 0 to 9 and combine them as you need.
Our 86cm number balloons: one size, planned around it
We only stock 86cm number shape balloons. That is a deliberate, simple choice: 86cm is tall enough to dominate a table setup, a doorway or a photo backdrop, and it is easy for guests to read from across the room. Our number shape foil balloons are unprinted, so the colour does the talking and the digit is the message.
Because the size is fixed, your planning is about where the numbers will sit rather than which size to pick. Here is how we suggest thinking about it.
Measure the space first
An 86cm digit is close to the height of a young child’s body, so it needs room. Before you order, check the wall, table or corner where it will go. Allow space on each side for a second digit if you are spelling a two-digit age, and think about furniture that might block the view. Viewing distance matters: the further away guests will be, the more a tall digit earns its place.
Think about the room, not just the table
A home lounge room, a backyard and a function hall all behave differently. In a large hall, bright metallic colours catch the eye on their own. Softer shades look lovely up close but may need surrounding balloons or a backdrop to stand out across a big space. Planning for that is easier than fixing it on the day.
Helium or air: which fill suits your display
Both work. The choice depends on what you want the number to do.
| Helium | Air | |
|---|---|---|
| Look | Floats, moves, adds height | Stays where you put it |
| Best for | Entrances, tables, floating above a weight | Walls, backdrops, garlands, arches, stands |
| Fixing | Tie securely to a weight | Tape, fishing line, stand or attach to a structure |
| How long it looks good | Shorter, often a few days indoors | Longer, often well beyond the party |
| Equipment | Helium and a regulator or inflator | Electric pump or inflator |
One practical note: a big number uses a lot of gas. If you are filling several digits with helium, allow for that when you plan quantities, and work out whether you want floating numbers for a single hero moment or air-filled numbers for the whole event.
Find the right gear in our balloon and party accessories, including helium and inflators, and ribbons and clips for tying and hanging.
How to inflate and secure your number balloons
Foil number balloons are not complicated, but the order you do things in makes a difference.
- Lay out the number flat and check it is the digit you ordered and the right way up before you fill.
- Fill gently. Foil does not stretch like latex. Over-inflating strains the seams, so stop when the balloon is full and the shape is smooth, not tight. If you are using helium, a regulator helps you control the flow.
- Let the valve seal itself. The self-sealing valve closes as you remove the nozzle. Do not force anything into it.
- Secure it. Tie helium balloons to a weight so they cannot drift off. Tie air-filled ones to a stand, tape them to the wall, or hang them with fishing line.
- Check the shape after an hour or so. If one has creased or looks uneven, lightly smooth it out.
Timing is the easy way to get a better result. Fill helium numbers as close to the party as you can, ideally the same day. Air-filled numbers can be done a day or two ahead because they hold their shape longer, which takes pressure off the morning of the event.
Keep inflated numbers out of direct sunlight and away from heaters. Heat makes the gas expand and can stress the seams, and a car boot on a warm day is the classic way to ruin a number before it reaches the party.
Combining digits into an age
Because each balloon is one digit, the maths is easy.
- Single-digit ages (1 to 9): one balloon. Popular for first birthdays and children’s parties.
- Two-digit ages (21, 40, 50): two balloons side by side, which is the most common milestone setup.
- Three digits (100): three balloons. A century birthday or a 100-day, 100-year or 100-member celebration looks impressive across a wall.
- Years: four balloons for a year, such as an anniversary or founding year.
A few tips for a pair of digits. Place them at the same height so the age reads as one number. Leave a small gap rather than overlapping, so each digit stays legible. If you are using helium, give both the same weight and ribbon length so they float together.
Colours and styling ideas
Colour is the biggest styling decision, because the digit itself is a fixed shape. Here are combinations that work well, based on common party styling approaches.
- Gold or silver for adult milestones: clean and elegant, they suit 30th, 40th and 50th celebrations and corporate occasions.
- Rose gold for showers and weddings, or a soft celebration: warm and photogenic.
- Blue and pink for children and gender reveals: a pair of digits in two colours, or one of each for a double celebration.
- Black and gold for a bold, grown-up look: especially for milestone parties and business events.
The styling trick we recommend most is pairing numbers with something organic. A single digit against a blank wall can look sparse. Put it with a garland or cluster of latex balloons in coordinating colours and it looks much more finished. Styling guides make the same point: numbers photograph best when they sit within a balloon garland rather than alone.
A few more decoration ideas:
- Anchor a pair of floating numbers either side of the dessert table.
- Tape air-filled digits to a plain wall and add a bunch of latex balloons at the base.
- Place numbers on a stand beside the entrance as a welcome.
- Add birthday foil balloons with a message for people to read up close, so the numbers handle the age and the other foils handle the greeting.
- Add a letter shape foil balloon set to spell a name alongside the age.
What to check before you buy
A short checklist saves most last-minute problems.
- The digits and quantity: list every digit you need, including repeats. A 22nd birthday needs two 2s.
- Colour: choose one that stands out from the wall and the room, not just one you like on screen.
- Fill method: decide helium or air, and buy the equipment to match.
- Weights and ribbon: if you are using helium, you will need a weight and a ribbon or string for each balloon.
- Lead time: order well before the day so you have time to fill and test the numbers.
- Quality signs: a well-made foil balloon holds its shape and does not leak at the seams after filling. If a balloon arrives already damaged, contact us straight away.
Looking after them, and reusing them
Foil number balloons are reusable if you treat them gently. After the party, let the air out by opening the valve, for example with a straw, press the air out gently from the far end towards the valve, and store them flat. Next time, simply inflate them again. Keeping them out of sunlight and away from heat in storage helps them last.
Air-filled numbers are the easy way to get repeat use, since you can fill them at home with a pump and keep them for the next celebration.
Safety and responsible disposal
Balloons are not toys. Young children can choke on uninflated balloons and on pieces of a burst balloon, so supervise children around them, keep uninflated balloons out of their reach, and pick up burst pieces straight away.
Tie helium-filled numbers securely to a weight. Never release a foil balloon outdoors: the metallic film can tangle in power lines and it ends up as litter. When the party is over, remove the ribbon from deflated balloons and put everything in the bin, or keep the foil numbers to use again.
Add a logo or message to your number display
If you are planning a business anniversary, a launch or a corporate event, numbers show the milestone and custom printed balloons carry the brand. Our 60cm custom printed balloons are priced from $13.20 to $31.35 each, and our 90cm custom printed balloons start from $17.60 each, with prices shown on each product page. We also make 30cm custom printed balloons, so you can print a logo or message at the size that suits your display.
Ready to build your setup? Start with the 86cm number shape balloons, add helium and inflators, and see our custom printed balloons for logos and messages. You can also call us on 1300 720 230.
FAQ
How big are your number balloons?
We only stock 86cm number shape balloons. That height gives a strong visual impact for birthdays, anniversaries and milestone photos, and it is easy to read from across a room. Each balloon is a single digit, so a two-digit age needs two balloons.
Can I fill number foil balloons with helium or air?
Yes, both. Helium makes them float and suits tables and entrances when they are tied to a weight. Air suits walls, backdrops, stands and garlands, and air-filled foil usually looks good for longer. Choose the fill that suits how you plan to display them.
How far ahead should I inflate them?
Fill helium numbers as close to the event as you can, ideally on the day. Air-filled numbers can be filled a day or two before, which takes pressure off the morning. In both cases, keep them out of direct sun and away from heaters.
Can I reuse number balloons?
Yes. Open the valve, let the air out gently, press out the remainder from the far end towards the valve, and store them flat. They can then be inflated again for the next celebration.
Do you sell number balloons with an age already printed?
Our number shape range is unprinted: you choose the digits and colours to make the age. If you want a name, a message or a logo, our custom printed balloons are available in 30cm, 60cm and 90cm.
