I like the data plates that the EAA makes. They're the size of a post card and have space for the required data (3 things). In addition you can list your address, type engine, n-number, date of construction, phone number, favorite color, sign of the zodiac, date of first solo, mother's maiden name and more. I cut them into 6 pieces, turn 'em over and inscribe the THREE required items and have 5 pieces left over for my next projects. On our 320 we used the double sided tape like Scott. Held on good for almost 10 years now.

Bill Harrelson
N5ZQ 320 1,850 hrs
N6ZQ  IV under construction