We accept .jpeg, .jpg, .png, and .gif files. Golf ball markers are small, so the types of logos that reproduce best will have no shading or detailed lines. Keep in mind we are  burning an image into the marker with a laser.  Imagine your logo is being faxed or photocopied in black and white - if it would not come through clearly in a fax, it will not be legible when laser engraved.For logos with multiple colors, we do our best to convert the image into a line drawing while retaining as much detail as possible. If you are unsure if your image will work, please send us an email with the image before placing your order.