6" on 6 7/8" Portable Flex Sign Letters for Changeable Portable Marquee Signs and Reader Boards 6" CONDENSED FLEX LETTERS are printed on a 6 7/8 inch Clear FLEXIBLE Plastic Panel. Will fit signs that use 6 7/8 and 7" FLEXIBLE plastic panels. FLEX LETTERS are printed on thin Flexible plastic and will "Bend End to End". If your letters don't bend as shown in picture you need the RIGID type letter. The CONDENSED FONT STYLE is a narrow font and allows more changeable letters per line. The letters are Black with Red Numbers with Mixed Punctuation & Symbols - 250 piece set NOT FOR ALL SIGNS: Used mostly on portable roadside signs. These letters are too thin to replace the thicker RIGID letter, Pronto or Zip letter. Your sign must use a letter flexible enough to bend 90 degrees by hand and panel must measure 6 7/8" to 7 inches. NOT FOR ENCLOSED SIGNS: These letters cannot be used behind a plexiglass, wind or vandal cover. DAMAGE will occur to letters if used behind enclosed covered signs.