Celtic styles, featuring intricately angled lines, are a popular choice for armband tattoos. They've become so common that some tattoo fans (and many people who aren't fond of tattoos) consider them a cliché. Then again, Celtic knots and traditional patterns have a long history, and the creation of a well-balanced and appealing design remains a form of art.
Celtic designs include spirals, interlacing lines, complex knots, and some animals, both real and mythical. A cross featuring traditional patterns is another popular design.
Armbands formed from the geometric shapes of Celtic designs work well because the design looks good from any angle. The style can represent your own Celtic heritage or an admiration of Celtic art and culture.