a img {
    max-width: 100%;
    height: auto;
    -ms-interpolation-mode: bicubic;
    display: inline-block;
    vertical-align: middle;
    border-radius: 50%;
    width: 120px;
    height: 120px;
    margin-bottom:40px;
}
.medium-2 a img {
    max-width: 100%;
    height: auto;
    -ms-interpolation-mode: bicubic;
    display: inline-block;
    vertical-align: middle;
    border-radius: 50%;
    width: 100px;
    height: 100px;
}