how to make buttons use the maximum space in html code example

Example 1: edit button html

<button style="height: 30px; background-color: none; border-radius:50%" id="edit_btn"> 
 <img src="https://www.flaticon.com/svg/static/icons/svg/61/61456.svg" style="height: 20px; width:15px; float:center; text-align: center" />
</button>`

Example 2: html button size

transform: scale(4); /* This will make the component 4 times bigger  */