i make mine large enough to write or embroider my name, the name of the recipient, the date and the place. if it's a special occasion, i might add that.
i am on the email list for dover publications and they send samples. whenever there's a sample of a frame-like picture, i bookmark it. later i print it out on label fabric and then write inside the frame. it gives the option of choosing the size frame i want, and the style. you can also choose to use just a corner clipart from them, also free.