.circulo{
    width: 70px;
    height: 70px;
    padding: 7px;
    border: 1px solid #6e6c6d;
    margin: 10px auto;
    border-radius: 50%;
}
.circulo img{
    height: 55px;
    width: 55px;
}
.caja-verde img{
    width: 79px;
    height: 73px;
}