Generally, PCB Trace Technologies Inc can handle board size up to 20 in x 24 in. However, our optimum working panel size is roughly 12 in x 18 in for sample runs & 18 in x 24 in for medium to large PCB production runs. In small quantities (Less than 25 units or so) panelization is not a critical item, but it is helpful with very small board sizes and with higher volumes. In certain cases, our Short-Run Production service does require panelization