* {
    box-sizing: border-box;
}

.content {
    padding: 0;background:yellow;width: 150px; height: 50px;
}

.padding {
    padding: 15px;background:green;width: 180px; height: 80px;
}

.border {
    padding: 5px;background:black;width: 190px; height: 90px;
}
.margin {
    padding: 15px;background:orange;width: 220px; height: 120px;
}


/*
* {
    box-sizing: border-box;
}

.content {
    padding: 0;
}

.padding {
    padding: 15px;
}

.border {
    padding: 5px;
}

.margin {
    padding: 15px;
}
*/