take 5" muslin squares, add 3 1/2" scrappy squares to opposite corners, stitch across diagonally, trim the outside triangles and press the scrappy triangles toward the corner. you now have a white center where things are written/signatures, and scrappy corners, or you can of course use a certain color scheme. look in the pictures area for siggy blocks i think there is not only a tutorial but also pictures of layouts with them
i only said 5" starting because it sounded to me that you wanted to write more than a name on them maybe wanted them larger, we did the siggy blocks starting with 3 1/2" squares, you can adjust for any size you want