Why is there additional space below checkbox? It is not identified in DevTools but expands its container on about 3-4 pixels.
I've tested it in Firefox and Edge browsers, it seems that checkbox has inconsistencies in its visualization (Firefox doesn't change the size of it despite the height: 50px; width: 50px;
I use Chrome 67 (on Windows 10). The problem seems the same in Edge.
Here is JSFiddle:
extra space below checkbox
* {
  box-sizing: border-box;
}
.container {
  border: solid 1px;
  padding: 0;
}
input {
  height: 60px;
  width: 60px;
  margin: 0;
}<div class="container">
  <input type="checkbox" />
</div> 
    