It usually depends on the aspect ratio and the resolution of your device. But generally, it should be clearly visible and not too small or too large to look odd.
The size of the icon on Instagram Story can vary. Usually, it's designed to be proportionate to the overall layout and fit nicely within the frame without being overly prominent or getting lost. It's all about creating a balanced visual.
The icon size on Instagram Story isn't fixed. It's adjusted to look good and be easily recognizable. Sometimes it might be a bit smaller for a more minimalist look, or larger if it's a key element. It all depends on the design and the purpose of the story.