How to limit the border?

Question

Hi.
When you add a border to an element using CSS, the border stretches to the right to the end. How to limit the length of the border?

p.first {
padding: 10px;
border-style: solid;
border-width: 2px;
}
p.second {
padding: 10px;
border-style: solid;
border-width: 5px;
}

Answer 1

box-sizing:border-box;

But it should require prefixed versions to be supported by major browsers and/or versions:

-webkit-box-sizing:border-box;
-moz-box-sizing:border-box;
box-sizing:border-box;

Answer 2

Thank you