Zippy-R Pack dimensions

Hey everyone, I have a question about the Zippy-R packs. I know on HobbyCity it says the packs are 170mm long, but are they really that in the real world? Because I know that when I got my TP packs, it was stated that they were 160mm in length, but in the real world when I got them they measured more like 165... So does anyone know if the Zippy-Rs are really 170mm? I don't want to drop $200+ on three packs if they are going to be too long.
Thanks!