While there are monogram makers online, you may want to customize further or simply say that you created the design yourself. I recommend modifying the design rather than using the files directly so that you can create something that matches your tastes. Try combining the letters with different images or borders.
This project can be done in xcs on desktop or the mobile app
Use the Shape, Basic Shape function or check that the Width and Height dimensions are equal to ensure that the shapes are perfect circles. Make one circle the overall size you want. Make the other circle smaller by about 10 mm.
Select both circles. Vertical Align Center and Horizontal Align Center. Now you can resize the smaller circle if desired. This will be your monogram outline.
With both circles still selected, choose Combine, Subtract. This will allow you to engrave the space in between the two circles.
Use the Text function to add text. You can use a name, initials, or another word or phrase. Size the text so it fits within the inner circle. For a traditional monogram, add separate text features for each initial. Vertical Align Center and Distribute Horizontally to have the letters arranged evenly.
When ready to engrave, Unite all features so all engraving is completed in one pass. The sample flies do not have the features combined so you may more easily edit the text.
Since you can use your design on any item, this instruction cannot provide the settings for your material. Some suggestions are key chains, coasters, tumblers, and other drinkware.