CSS

make a paragraph fit in div

.limit{
    width:50px;
    word-wrap: break-word;
}

css text to fit container

//The viewport-percentage lengths are relative to the size of the initial
//containing block. When the height or width of the initial containing block
//are changed, they are scaled accordingly.
//vw = (% of the viewport width). So using it will look like this:
p {
    font-size: 2.5vw;
}