Padding is adding space to the button, so you can make the button bigger or smaller adjusting this setting.
- Open the Elementor page builder / edit with elementor.
- Click on the burger menu in the upper left corner.
- Click on site settings.
- Click on Buttons.
- Then locate padding type, adjust to the value there fits for you.
- Then you can change border size/width, color and also radius which will give the border round corners.
- Click update to save your settings.