A template device is used layout and marking geometric shapes such as martial arts or other sports rings on a floor. The device includes a central body at or near the center, and an extension reaching from preferably at least three sides of the central body to the perimeter, of the geometric shape. Both central body and extension are rigid or substantially rigid, maintaining the shape of the template device, including optional wire/cable around or along the extension, during both use on the floor and transport to adjacent floor areas. The template device covers a very small percentage of the geometric shape area, by means of empty space in the extension or between members of the extension. The resulting light-weight and small-volume device is easy to move and break down into a small package. The extension may include radially-extending legs attaching at their outer ends to the wire/cable perimeter.