What is the minimum button width?
Studies by the MIT Touch Lab suggests that 10mm x 10mm is the best minimum size for buttons due to the average size of fingertips. Designing buttons must not only be pleasing to the eye, but they also need to make tactile sense for the user.
What are buttons used for?
Buttons are clickable elements that are used to trigger actions. They communicate calls to action to the user and allow users to interact with pages in a variety of ways. Button labels express what action will occur when the user interacts with it.