style radio, checkbox as a button

index.html

<div>
  <div class='ck-button'>
    <label>
      <input
        type='radio'
        name='size'
        defaultChecked
        defaultValue={product.size8}
      />
      <span>size 8</span>
    </label>
  </div>
  <div class='ck-button'>
    <label>
      <input
        type='radio'
        name='size'
        defaultValue={product.size10}
      />
      <span>size 10</span>
    </label>
  </div>
  <div class='ck-button'>
    <label>
      <input
        type='radio'
        name='size'
        defaultValue={product.size12}
      />
      <span>size 12</span>
    </label>
  </div>
</div>

style.css

.ck-button{
  margin: 4px;
  margin-top: 0;
  background-color: #fff;
  border-radius: 4px;
  border: 1px solid #f24472;
  overflow: auto;
  float: left;
}

.ck-button:hover {
  background: #f2447257;
}

.ck-button label {
  cursor: pointer;
  float: left;
  font-size: 16px;
  width: auto;
}

.ck-button label span {
  text-align: center;
  padding: 3px 0px;
  display: block;
  padding: 4px 10px;
}

.ck-button label input {
  position: absolute;
  top: -20px;
}

.ck-button input:checked + span {
  padding: 4px 10px;
  background-color: #f24472;
  color: #fff;
}