Trodat 4913 Self Inking Stamp 3/4" x 2 1/8". Your signature will be sized to fit these dimensions. If you would like to add text to your signature stamp, there will be a $5.00 charge. Please include the text in "Special Instructions" at checkout. After placing your order, email your signature to sales@thestampmaker.com. Signatures need to be signed in black ink, on white paper, and sent at 600dpi as a .pdf, .tif or .eps.