Making up down arrow of HTML's input number much bigger and cleaner

Question

Rather than Is it possible to always show up/down arrows for input "number"?, I want to be able to make up/down arrow much bigger and cleaner.

What I have right now:

I need to make them bigger like this:

Answer 1

you can wrap a input in and element and style it

div {
  display: inline-block;
  position: Relative;
  border: 2px solid grey;
  border-radius: 10px;
  overflow: hidden;
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}
div:before,
div:after {
  background: white;
  right: 0px;
  width: 30px;
  height: 20%;
  position: absolute;
  pointer-events: none;
}
div:before {
  content: '';
  bottom: 50%;
  background: url(http://cdn.flaticon.com/png/256/22205.png) no-repeat white;
  background-size: 20px;
  background-position: center;
}
div:after {
  content: '';
  top: 50%;
  background: url(http://cdn.flaticon.com/png/256/22205.png) no-repeat white;
  background-size: 20px;
  transform: rotate(180deg);
  background-position: center;
}
input {
  height: 80PX;
  font-size: 50px;
  outline: 0;
  border: 0;
}

<div>
  <input type="number" value="10" />
</div>