Best Balloons & Banners — 40cm (2026)
1 balloons & banners matching size “40cm”, hand-picked from UK Amazon listings.
Not sure which one to pick? Read our Best Balloons & Banners UK (2026) guide.
These 40cm Balloons & Banners are perfect for adding a festive touch to smaller celebrations. Crafted from durable mylar, these balloons feature vibrant banner graphics – ideal for birthday parties, garden events or simply brightening up a space. The included banners attach securely to the balloons, creating a cheerful display that’s easy to set up and take down.
Each pack contains a selection of colourful balloons and coordinating banners, offering versatility in decorating. These balloons are lightweight and floatable, ensuring they stay aloft during your event. They're also great for adding a splash of colour to children's rooms or party favors – simply inflate them with air (helium not included).
Measuring 40cm in diameter, these balloons are ideal for smaller spaces or when you want a more concentrated burst of festive cheer. Please note that helium is required for the balloons to float; we recommend using a helium tank or canister for best results. Ensure you have access to an appropriate pump for inflating.
#1 Pick
Happy Birthday Foil Balloon 40cm Navy Blue Star Shape with Silver Holographic Lettering for Classroom Parties, Inflatable Air and Helium- Navy/Silver
- 40cm
£3.75
Pros
- Star shape stands out against round balloon bunches
- Navy and silver colourway suits classroom or boys parties
- Compact 40cm size is easy to post or store
Cons
- Small size needs pairing with other balloons for a fuller display
FAQ
What size are the banners?+
The banner graphics measure approximately 20cm x 15cm, perfectly complementing the 40cm balloons without overwhelming them.
Do I need helium to inflate these?+
Yes, for optimal floating effect, you'll require helium. Standard air inflation will work but won't allow the balloons to rise.
Are the balloons suitable for outdoor use?+
The mylar balloons are generally suitable for outdoor use in moderate weather conditions. However, prolonged exposure to direct sunlight or extreme temperatures may cause them to deflate more quickly.
How many balloons are included per pack?+
Each pack contains 6 balloons and 6 coordinating banners, providing a generous amount for decorating purposes.
What is the material of the balloons made from?+
These balloons are constructed from durable mylar, known for its ability to hold air and maintain its shape over time. This material is also lightweight and flexible.
Can I inflate these balloons with air instead of helium?+
Absolutely! You can use a standard balloon pump to inflate these balloons with air. However, they won’t float as dramatically as when filled with helium.
Are the banners easily removable from the balloons?+
The banners are designed for easy attachment and removal. They snap securely onto the balloons and can be detached just as quickly – no complicated tools required.
What is the recommended age range for these balloons?+
These balloons are suitable for ages 3 years and up, under adult supervision. Small parts could pose a choking hazard.
How do I store the balloons to prolong their lifespan?+
Store the unused balloons in a cool, dry place away from direct sunlight and heat. This will help preserve their shape and prevent premature deflation.
Are these balloons recyclable?+
Mylar balloons are not typically recyclable through standard household recycling programs. However, some companies specialise in mylar balloon recycling – you may be able to find a local service.