1. A method comprising: displaying a target image of a subject on an output of a computing device; displaying a digital template image on the output of the computing device, wherein the displayed digital template image is an outline of a shape of an implantable member for implantation in the subject and is oriented with respect to the displayed target image; receiving one or more inputs to the computing device from a user simultaneously selecting at least two parts of the displayed digital template image; based on the received input of selecting at least two parts of the displayed digital template, adjusting the displayed digital template image, wherein adjusting the displayed digital template image alters at least one of a scale of the displayed digital template image, a rotation of the displayed digital template image, or a position of the displayed digital template image so that the adjusted displayed digital template image substantially fits a selected part of the displayed target image; selecting a physical template size from measuring the adjusted scaled displayed digital template from a discrete range of a plurality of physical template sizes, wherein, out of the physical template sizes in the discrete range, a physical template of the selected physical template size is a closest match to the adjusted scaled displayed digital template; and displaying the adjusted scaled displayed digital template image as a discrete physical size of the implantable member on the output of the computing device that is chosen from a discrete range of virtual sizes; wherein displaying the adjusted digital template image includes a change in size of the displayed digital template which jumps between at least a selected sub-plurality of a plurality of discrete digital template sizes from a range of discrete digital template sizes; wherein the changing in size is based on the received one or more inputs of at least scaling the displayed digital template image.