Often these are different sizes depending on the molding thickness.. but this is pretty common for areas like vinyl roof edge molding.. or likely too on 60- 75 Buick, Chev Impala, Pontiac GP, Full size.. pretty endless .
Size matters. to this photo tells ou is approx 15mm tall.. the length does not matter.
Also note. there is a smaller white height one.. rarely used that white one is 11mm .. (#14642).. yell out if thats needed.. but this listing is for the GREEN one.. and colour does not signify the product either incase your wondering.. just different makers over time.. could be purple or pick or..who knows.. its the height that matters.