What suits the forearm
The forearm handles almost any subject, but it rewards designs with a clear vertical flow. Script, dates, compasses, animals, religious imagery and geometric patterns all work because they can run along the arm's length. Inner forearm skin is smoother and flatter, making it the natural home for portraits, fine detail and readable lettering. The outer forearm has more curve and muscle definition, which suits bolder shapes and traditional motifs that don't rely on tiny detail. If you want a design that stays crisp for years, avoid cramming heavy detail into a small footprint here; give it room to breathe.