Jonhamwelbor Black 40th Birthday Number Balloons — Giant 42-Inch Foil Mylar No.4 & No.0 Set

Bold, elegant celebrations start with a striking milestone display

Celebrate a memorable milestone with the Jonhamwelbor 40-number balloon set. These two large foil Mylar numerals deliver a clean, modern look in a classic black finish. When inflated, they measure about 42 inches in overall size, creating a bold focal point that reads clearly in photos and at a glance. The set includes two pieces to form the iconic 40: No.4 and No.0, making it simple to craft a dramatic display for a 40th birthday, a 40th anniversary, or other milestone events.

What’s included

• Two pieces: No.4 and No.0 black foil number balloons, designed to read as 40 when arranged together.
• Each numeral is a 40-inch class balloon that looks like a 42-inch display once inflated.

Material, inflation, and care

• Made from aluminum foil Mylar for a sleek, reflective surface that photographs well under party lighting.
• Inflate with helium or air using the straw included in the package. Fill slowly and stop around 90% capacity to prevent over-expansion.
• To maintain shape and avoid unintended popping, keep away from direct heat and excessive sun exposure.

Display ideas and practical uses

• Stick or hang on walls, windows, or doors for a dramatic entrance, or place on a bed, floor, or table for a dynamic centerpiece.
• Pair with complementary décor, streamers, or balloons in metallics or neutrals to fit various party themes.

Tips for best results: avoid filling beyond 90% capacity, and if temperature shifts occur, you can top up using the included straw. This product is decorative and designed to enhance your event ambiance.

Customer care

We’re committed to helpful service and quality products. If you have any questions, contact us and we’ll work to resolve them promptly.