Why should cancel and confirm button have the same size?

Different sizes creates contrast, that creates visual clutter. Placing same size buttons around a virtual vertical axis creates symmetry, which is regarded as more pleasing, formal and stable.

1. What is the difference between cancel and close button?
2. What should cancel button do?
3. What is the difference between close and cancel?
4. What color should a cancel button be?

What is the difference between cancel and close button?

Presenting two distinct buttons: X for closing the view (with the side effect of saving intermediate work) and Cancel for abandoning the process.

What should cancel button do?

What does the Cancel button do exactly? It dismisses the user's current screen and brings them back to their previous one. This dismissive button is a safeguard to prevent unwanted changes to the system.

What is the difference between close and cancel?

What is the difference between Canceling and Closing a Sales Order? On a sales order you have the option to either "cancel" or "close" the order. A sales order can be "cancelled" if it has no completed invoices against it. If the order does have completed invoices against it, the order can be "closed."

What color should a cancel button be?

The Cancel button should have a neutral color to signify the neutral, non-committal button. When users see that the Cancel button has no color, they'll recognize it as the fallback to safety easier. It's critical for users who need to escape a confirmation screen to notice this.