How to create a ribbon shape in CSS

Question

http://jsfiddle.net/6HyjZ/

.bookmarkRibbon{
     width:0; 
     height:100px; 
     border-right:50px solid blue;
     border-left:50px solid blue;
     bord         


        

Answer 1

.bookmarkRibbon{
     width:100px; 
     height:0; 
     border-bottom:50px solid blue;
     border-top:50px solid blue;
     border-right:30px solid transparent;
}

Answer 2

To help you visualize the logic step-by-step
so you can apply it easily on ANY SIDE you desire:

.bookmarkRibbon {
  border:       50px solid blue;        /* All borders set */
  border-left:  0;                      /* Remove left border */
  border-right: 30px solid transparent; /* Right transparent */
  width:        100px;                  /* Increase element Width */
}

<div class="bookmarkRibbon"></div>