Airport Check-in back wall doorway specifications When the back wall is less than 12' and includes a door, always place the logo on the widest wall width to the left or right of the door. If the left and right wall widths are equal, place the logo to the left of the door. Note: Apply the logo using matte vinyl printed stock. Single logo sign wall with door below 12' C L 9' Door buck 6' Logo is printed using vinyl. Bold Blue Airport Style Guide Southwest Airlines Brand Style Guide | 130