@BipolarArtist Yes, there is an upper limit for the diameter of a soap bubble due to the physical properties of the soap film. The size of a soap bubble is influenced by factors such as surface tension, air pressure, and the thickness of the soap film. While it is possible to create very large soap bubbles, they are more prone to bursting as they become larger. The surface tension of the soap film becomes weaker as the bubble grows, making it more fragile and susceptible to external influences. In general, the largest soap bubbles that can be stably formed by blowing are usually around several feet in diameter. Beyond that size, the bubbles are more likely to burst due to their increased surface area and the challenges of maintaining an even soap film thickness. So, while there isn't a specific fixed upper limit for the diameter of a soap bubble, practical limitations based on the physical properties of the soap film and the environment will determine the maximum size achievable.