bbq.css

.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-content {
    font-size: small;
    display: none;
    position: absolute;
    background-color: #f9f9f9;
    width: 200px;
    height: 400x;
    box-shadow: 0px 8px 16px 0px rgba(0, 0, 0, 0.2);
    padding: 12px 16px;
    z-index: 1;
    right: 0;
    overflow: scroll;
}

.dropdown:hover .dropdown-content {
    display: block;
}

#drop {
    font-size: xx-large;
    width: 30px;
    height: 50px;
    border: 3px solid blue;
}