This frame border is a true example of how easily a very elegant border can be drawn. First, a rectangular frame is drawn, and then the lines flowing around it. The drawing of the flowing lines depends on your creativity and needs your attention. The final step is to place stylized leaves or some other design elements in certain points along the flowing lines. This is a typical process of drawing decorations where the design elements need not only be leaves, but also flowers, buds, and the like. The most important thing is to design well the shape of the flowing lines, and to draw nice design elements or choose them from a collection.
If you take a look at the picture, you will see that this is an interesting border with a rather large vertical rectangular frame in which you need to insert not only an illustration, as shown in the original, but some text as well.