Edit in JSFiddle

<div id="koRilakkuma">
  <div id="face">
    <div class="eye leftEye"></div>
    <div class="eye rightEye"></div>
    <div id="snout">
      <div id="nose"></div>
      <div id="mouth">
        <div class="lip leftLip"></div>
        <div class="lip rightLip"></div>
      </div>
    </div>
    <div id="button">
      <div class="buttonHole"></div>
      <div class="buttonHole"></div>
      <div class="buttonHole"></div>
      <div class="buttonHole"></div>
    </div>
    <div class="clear"></div>
  </div>
</div>

/* 
Colors
Ko-Rilakkuma: feecc6 (beige)
Eyes and nose: 60474a (dk brown)
Button: E51024 (red)
*/

#koRilakkuma {
    background-color: #feecc6;
}

#face {
    width: 500px;
    margin: 0 auto 0;
    position: relative;
    padding: 100px 0 100px;
}
.eye {
    width: 90px;
    height: 90px;
    border-radius: 45px; /* Opera 10.5, IE 9, Saf5, Chrome */
    -moz-border-radius: 45px; /* FF1+ */
    -webkit-border-radius: 45px; /* Saf3-4 */
    background-color: #60474a;
}
.leftEye {
    float: left;
}
.rightEye {
    float: right;
}
#snout {
    background-color: #FDFCF3;
    float: left;
    height: 185px;
    margin: 16px 26px 26px;
    width: 268px;
    border-radius: 140px; /* Opera 10.5, IE 9, Saf5, Chrome */
    -moz-border-radius: 140px; /* FF1+ */
    -webkit-border-radius: 140px; /* Saf3-4 */
}

#nose {
    width: 70px;
    height: 70px;
    border-radius: 35px; /* Opera 10.5, IE 9, Saf5, Chrome */
    -moz-border-radius: 35px; /* FF1+ */
    -webkit-border-radius: 35px; /* Saf3-4 */
    background-color: #60474a;
    margin: 20px auto -35px;
}
#mouth {
    margin: 0 auto;
    width: 220px;
}
.lip {
    float: left;
    background-color: #60474a;
    width: 110px;
    height: 40px;
    border-radius: 20px; /* Opera 10.5, IE 9, Saf5, Chrome */
    -moz-border-radius: 20px; /* FF1+ */
    -webkit-border-radius: 20px; /* Saf3-4 */
}
.leftLip {
    -moz-transform-origin: top right; /* FF1+ */
    -webkit-transform-origin: top right; /* Saf3-4 */
    -o-transform-origin: top right; /* Opera 10.5+ */
    -ms-transform-origin: top right; /* IE9 */
    transform-origin: top right;

    -moz-transform: rotate(-45deg); /* FF3.5+ */
    -o-transform: rotate(-45deg); /* Opera 10.5 */
    -webkit-transform: rotate(-45deg); /* Saf3.1+, Chrome */
    -ms-transform: rotate(-45deg); /* IE9 */
    transform: rotate(-45deg);
}

.rightLip {
    -moz-transform-origin: top left; /* FF1+ */
    -webkit-transform-origin: top left; /* Saf3-4 */
    -o-transform-origin: top left; /* Opera 10.5+ */
    -ms-transform-origin: top left; /* IE9 */
    transform-origin: top left;

    -moz-transform: rotate(45deg); /* FF3.5+ */
    -o-transform: rotate(45deg); /* Opera 10.5 */
    -webkit-transform: rotate(45deg); /* Saf3.1+, Chrome */
    -ms-transform: rotate(45deg); /* IE9 */
    transform: rotate(45deg);
}

#button {
    background-color: #E51024;
    clear: both;
    height: 80px;
    margin: 0 auto;
    padding: 30px;
    width: 80px;
    border-radius: 70px; /* Opera 10.5, IE 9, Saf5, Chrome */
    -moz-border-radius: 70px; /* FF1+ */
    -webkit-border-radius: 70px; /* Saf3-4 */
}
.buttonHole {
    background-color: #FFFFFF;
    float: left;
    height: 30px;
    margin: 5px;
    width: 30px;
    border-radius: 15px; /* Opera 10.5, IE 9, Saf5, Chrome */
    -moz-border-radius: 15px;
    -webkit-border-radius: 15px; /* Saf3-4 */
}

.clear {
    clear:both;
}