Purchased many years ago on an Irish trip.  Keychain features Irish 1, 5, 10, 20 & 50 pound notes, all laminated (guess so you can eat off of them?) and increasing in size as they do in amount.  The 1 pound (the 'punt') is 2 3/8" x 1 3/8."   The 20 punt or pound measures at 3" x 1 5/8."  See photos for more details and condition, since the photos are part of this description.  Thanks.