Checked with them, the fuzzies are 1/4" LIKE EVERY AFTERMARKET AVAILABLE! Sad to say I found out the right thickness is NO LONGER PRODUCED for the 63-66 Dart. If you bought aftermarket you will find this out - no matter what brand! Correct thick material was made by a single company who quit making it years ago (COOPER STANDARD), so, all my 63-66 Dart friends, we are HOSED! Go ahead, throw up now!!