Your back is your biggest canvas.  Receiving a backpiece requires a serious commitment.  Included here is the visual display of the progression of sessions that lead to completion.  To give you a rough idea of the time involved, if done in 2-4 hour weekly sessions, a backpiece can typically be completed within a minimum of three months.  On average, depending on the style, the process can take up to 30, even 40 hours, for full color including cheeks.