#whatsappchat a {
    z-index: 9999;
    left: 17px;
    float: left;
    bottom: 88px;
    margin-top: -25px;
    cursor: pointer;
    min-width: 50px;
    max-width: 150px;
    color: #fff;
    text-align: center;
    padding: 10px;
    border-radius: 100%;
    margin: 0 auto 0 auto;
    background: #FFFFFF;
    -webkit-transition: all .5s ease;
    -moz-transition: all .5s ease;
    -o-transition: all .5s ease;
    -ms-transition: all .5s ease;
    transition: all .5s ease;
}

#whatsappchat a img{
	width: 48px;
}