This part is a grid template for the Printrbot Simple but it can be used on other printers too. It is sized at 94mm x 94mm. Use it to draw a pencil outline of your printable bed dimensions. See the instruction tab for more info.

The part is 0.4mm thick and will only need one layer (assuming you're using a 0.4mm nozzle).

Print it without a skirt and use a mechanical pencil to trace the outline.