A standard Chrome dialogue box size is not explicitly defined, as it can dynamically adjust based on the content displayed within it, but generally, it will be around 300 pixels wide by 200 pixels high depending on the type of dialogue box and the screen resolution you're using.

Key points to remember:

Dynamic sizing:

The dialogue box will expand to accommodate the necessary content, like longer text or more options, while still trying to maintain a reasonable size on the screen.

Customization limitations:

While you can adjust the overall browser window size, you cannot directly set a fixed size for specific dialogue boxes within Chrome.

Context-dependent:

The size of a dialogue box might vary depending on the action it's related to, like a simple confirmation box versus a complex settings panel.