.border-radius-demo .demo {
    position: relative;
    margin: 20px;
    border: 3px solid coral;
}

.border-radius-demo .demo:before {
    content: '';
    position: absolute;
    z-index: -1;
    width: 100%;
    height: 100%;
    outline: 3px dotted lightsteelblue;
}

.border-radius-demo .splitter-4 span:nth-child(4):after {
    content: '/';
    padding: 0 10px;
}

.border-radius-demo .measure {
    position: absolute;
    width: 20px;
    height: 20px;
    line-height: 20px;
    text-align: center;
    color: steelblue;
}

.border-radius-demo .measure.tl {
    bottom: 100%;
    left: 0;
}

.border-radius-demo .measure.tr {
    bottom: 100%;
    right: 0;
}

.border-radius-demo .measure.br {
    top: 100%;
    right: 0;
}

.border-radius-demo .measure.bl {
    top: 100%;
    left: 0;
}

.border-radius-demo .measure.lt {
    right: 100%;
    top: 0;
}

.border-radius-demo .measure.rt {
    left: 100%;
    top: 0;
}

.border-radius-demo .measure.rb {
    left: 100%;
    bottom: 0;
}

.border-radius-demo .measure.lb {
    right: 100%;
    bottom: 0;
}