.box-1 {
    display: inline-block;
    width: 200px;
    height: 200px;
    background-color: red;
    margin: 10px;
}

.box-2 {
    display: inline-block;
    width: 200px;
    height: 200px;
    background-color: green;
    margin: 10px;
}

.box-3 {
    width: 200px;
    display: inline-block;
    height: 200px;
    background-color: blue;
    margin: 10px;
}