Answers for "button length css"

css size button

button {
  font-size: 20px; /* Put your wanted size for your button here*/
}

button style css

<a class="pure-button" href="#">A Pure Button</a>
<button class="pure-button">A Pure Button</button>

button style css

<a class="pure-button pure-button-primary" href="#">A Primary Button</a>
<button class="pure-button pure-button-primary">A Primary Button</button>