Problem solved by myself.
I modified the css file in the plugin.
//public.css in assets/dist
// height and line height reduce from 2 to 1 em
// width reduce from 2 to 1em
// padding reduce from 0 0.5em to 0 0.1em
// right reduce from -0.3 to -0.5em
// bottom reduce from -0.3 to -0.5em
