4" on 5" Flex Change Portable Sign Letters for Changeable Letter Signs 4 inch Letters Printed on a 5 inch Clear Flexible Plastic Panel - Block Style Font Printed on Thin Flexible Plastic which will bend from End to End used for Sidewalk and Portable signs Black Letters, Red Numbers with Mixed Punctuation & Symbols - 276 piece set Flex Letters are NOT Replacements for RIGID Letters or Signs using Vandal or Wind Covers Not compatible with Swinger, Springer or Tip n Roll type of sidewalk signs