rug or a hard surface such as wood or concrete when used outdoors regular golf balls would be used during practice shots when used indoors foam or wiffle balls can be employed the golf mat 12 is cut in a specific pattern as shown in fig2 with the sides of various portions of the perimeter of the mat cut at various angles with respect to horizontal in one embodiment the mat shown in fig1 and 2 would constitute a single piece of material however it is also contemplated that a sub mat 50 as shown in fig3 would be glued or attached in any other manner to the underside of the mat 12 the mat 12 is produced from any standard indoor outdoor mat material wherein the sub mat 50 can be cut from a vinyl sheet material the outside pattern of both the mat 12 as well as the sub mat 50 would be exactly the same when used with the sub mat the mat 12 would be provided with three slits or slots 14 16 and 18 the top of the sub mat 50 would be provided with a first colored line or tape 52 aligned with the slit 16 and extending for at least the length of the slit 16 a second colored line 54 would be provided under the slit 18 and would also extend for at least the length of the slit 18 a third colored line 56 would be.