Pickup covers seem to be wrong size. Jazz vs. Precision

[Steve Tucker]

Recently, I purchased pick up covers for my fender jazz bass. The covers are fine. I now have a precision and the top pick up cover I purchased for the jazz seem too small for the precision. My question is, are they different sizes? Perplexing.
Steve

 

[Dominic D]

Are you talking about a P bass with a jazz bridge pickup?

 

[jamro217]

Jazz pickups are two different sizes. The bridge pickup is slightly larger than the neck pickup. If you try to put the neck pickup cover on a bridge pickup it will be too small, the opposite is true for the other combination. The Jazz bridge pickup is the usual choice for a P/J. Hope this helps.

 

[Leo Smith]

The pickup covers for the old P and J basses were completely different sizes. The J bass one was smaller, not as wide, since that pickup is also narrower than a P pickup. Might also stand to reason that the width across the body was different, so the screw holes don't match up.

EDIT - to be clear, I'm talking about the chrome covers that went on the body over the strings, commonly now called "ashtray covers". I think you, OP, are talking about the plastic cosmetic housing that helps the pickup get screwed into the body?