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HTML 

              
                <main>
  <h2>Scalable CSS Switches</h2>
  <h5>Change the size of each switch by editing the "font-size" property of each hr.</h5>
  <ul>
    <li>
      <input id="c1" type="checkbox">
      <label for="c1">
        <hr>
        Slide switch
      </label>
      <p>based on <a href="https://dribbble.com/shots/755717-Switch">https://dribbble.com/shots/755717-Switch</a></p>
    </li>
    <li>
      <input id="c2" type="checkbox">
      <label for="c2">
        <hr>
        Rocker switch
      </label>
      <p>based on <a href="https://dribbble.com/shots/55163-Rocker-switch">https://dribbble.com/shots/55163-Rocker-switch</a></p>
    </li>
    <li>
      <input id="c3" type="checkbox">
      <label for="c3">
        <hr>
        Button switch
      </label>
      <p>based on <a href="https://dribbble.com/shots/691868-Simple-Switch">https://dribbble.com/shots/691868-Simple-Switch</a></p>
    </li>
  </ul>
	<p>
		An original pen by <a href="https://codepen.io/ejsado/">Eric</a>.
	</p>
</main>
!

CSS 

              
                @import url(https://fonts.googleapis.com/css?family=Open+Sans:400,700);
@import url(http://weloveiconfonts.com/api/?family=fontawesome);

body {
  font-family: "Open Sans", "Arial";
  background: #F2F2F2;
}
main {
  width: 300px;
  margin: 50px auto;
}
ul {
  list-style-type: none;
  padding: 0;
  margin: 0;
  display: block;
}
ul > li {
  padding: 30px;
  margin-left: -30px;
  margin-bottom: 20px;
}
li:nth-child(2) {
  background: #2E2E2E;
  color: #EEE;
  border-radius: 3px;
}
li:nth-child(2) a {
  color: #278BC4;
}
li:nth-child(2) a:visited {
  color: #8C6CB7;
}
input {
  display: none;
}
label {
  display: inline-block;
  font-size: 14px;
  cursor: pointer;
}
p {
  font-size: 9px;
}
hr {
  display: inline-block;
  margin: 0 20px 0 0;
  padding: 0;
  vertical-align: middle;
}

/* FRIST SWITCH */

/* bg */
label[for="c1"] hr {
  width: 4em;
  height: 1.75em;
  font-size: 20px; /* use this value to scale the switch */
  background: #BDBDBD;
  border: none;
  border-radius: 0.2em;
  box-shadow: inset 0 0 0.5em rgba(0,0,0,0.3);
  position: relative;
  color: #FFF;
  text-shadow: 0 0 0.1em rgba(0,0,0,0.3);
  overflow: hidden;
  font-family: 'FontAwesome', sans-serif;
  transition: all 300ms;
}
/* square and check */
label[for="c1"] hr::before {
  content: "\f00c";
  display: block;
  position: absolute;
  background: linear-gradient(to bottom, #FFF 0%, #EEE 100%);
  box-shadow: 0 0 0.2em rgba(0,0,0,0.2);
  width: 1.8em;
  height: 1.35em;
  margin: 0.2em;
  border-radius: 0.15em;
  text-indent: -1.5em;
  line-height: 1.3em;
  transition: all 300ms;
}
/* circle and x */
label[for="c1"] hr::after {
  content: "\f00d";
  display: block;
  position: absolute;
  background: linear-gradient(to top, #FFF 0%, #EEE 100%);
  width: 0.8em;
  height: 0.8em;
  margin: 0.5em 0.7em;
  border-radius: 50%;
  text-indent: 1.9em;
  line-height: 0.75em;
  transition: all 300ms;
}
#c1:checked + label[for="c1"] hr::before, #c1:checked + label[for="c1"] hr::after {
  transform: translateX(1.85em);
}
#c1:checked + label[for="c1"] hr {
  background: #79D122;
}

/* SECOND SWITCH */

/* bg */
label[for="c2"] hr {
  width: 5.6em;
  height: 1.5em;
  font-size: 20px; /* use this value to scale the switch */
  background: #111;
  border: solid 0.25em #1A1A1A;
  border-radius: 0.3em;
  box-shadow: inset 0 1px 0 0 rgba(0  ,0  ,0  ,0.1),
                    0 1px 0 0 rgba(255,255,255,0.1);
  position: relative;
  font-family: 'FontAwesome', sans-serif;
  transition: all 300ms;
}
/* left side */
label[for="c2"] hr::before {
  content: "\f00d";
  display: block;
  position: absolute;
  background: linear-gradient(to bottom, #363636 0%, #282828 100%);
  border-top: 1px solid rgba(255,255,255,0.2);
  width: 2.8em;
  height: 1.45em;
  border-radius: 0.15em 0 0 0.15em;
  line-height: 1.3em;
  text-indent: 1em;
  transform-origin: right top;
  transform: none;
  box-shadow: none;
  color: #278BC4;
  text-shadow: 0 0 0.4em rgba(39,139,196,0.5);
  transition: all 100ms;
}
/* right side */
label[for="c2"] hr::after {
  content: "\f00c";
  display: block;
  position: absolute;
  background: linear-gradient(210deg, #444 0%, #222 100%);
  border-top: 1px solid rgba(255,255,255,0.25);
  width: 2.8em;
  height: 1.45em;
  border-radius: 0 0.15em 0.15em 0;
  margin-left: 2.8em;
  line-height: 1.3em;
  text-indent: 0.95em;
  transform-origin: left top;
  transform: skew(0,-5deg) scale(0.95,1);
  box-shadow: 0.1em 0      0 -0.05em #111,
              0.2em 0      0 -0.1em  #111,
              0.3em 0.05em 0 -0.15em #111;
  color: #000;
  text-shadow: none;
  transition: all 100ms;
}
#c2:checked + label[for="c2"] hr::before{
  background: linear-gradient(150deg, #444 0%, #222 100%);
  border-top: 1px solid rgba(255,255,255,0.25);
  transform: skew(0,5deg) scale(0.95,1);
  box-shadow: -0.1em 0      0 -0.05em #111,
              -0.2em 0      0 -0.1em  #111,
              -0.3em 0.05em 0 -0.15em #111;
  color: #000;
  text-shadow: none;
}
#c2:checked + label[for="c2"] hr::after {
  background: linear-gradient(to bottom, #363636 0%, #282828 100%);
  border-top: 1px solid rgba(255,255,255,0.2);
  transform: none;
  box-shadow: none;
  color: #278BC4;
  text-shadow: 0 0 0.4em rgba(39,139,196,0.5);
}

/* THIRD SWITCH */

/* bg */
label[for="c3"] hr {
  font-size: 20px; /* use this value to scale the switch */
  margin-bottom: 0.5em;
  width: 3.4em;
  height: 3.4em;
  background: radial-gradient(circle cover at 50% 90%, rgba(0,0,0,0.07) 0%, rgba(255,255,255,0.2) 80%, rgba(255,255,255,0.3) 100%);
  border-radius: 50%;
  border: 0.3em solid #777;
  box-shadow: inset 0 0 0 0.1em rgba(0,0,0,0.08);
  transition: all 50ms;
}
/* circle */
label[for="c3"] hr::before {
  content: "";
  display: block;
  position: absolute;
  width: 4em;
  height: 4em;
  margin: -0.3em;
  position: relative;
  border-radius: 50%;
  border: none;
  box-shadow:       0 -0.2em 0.3em 0.3em rgba(255,255,255,0.3 ),
                    0  0.2em 0.3em 0.3em rgba(0  ,0  ,0  ,0.05),
              inset 0  0     0.2em 0     rgba(0  ,0  ,0  ,0.3 );
}
#c3:checked + label[for="c3"] hr {
  border-color: #CAEE00;
  background: radial-gradient(circle cover at 50% 10%, rgba(0,0,0,0.07) 0%, rgba(255,255,255,0.2) 80%, rgba(255,255,255,0.3) 100%);
  box-shadow: inset 0 0 0 0.1em rgba(177,209,0,0.5);
}
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