PCV too small for grommet

It's a repro stock RB engine PCV...I can't remember where I bought it. Just a tiny bit too small for the grommet. This should be easy, which piece to change? thanks

You might take it to your parts house & compare it to another one & possibly some RTV sparingly on the PCV OD might tighten it up.

Which style of PCV valve is it? Three different styles so it would be interesting of the style and if your using the reproduction grommet as well. Thanks for the information.

It's an off white color, with the words Made in USA in one place and the number 210 in antother place. Gotta get my photobucket hosting working again.