Size of retaining pins?

[suckerv]

Does anyone know the size of the three bumper push pins that are in the wheel well? Sorry I'm not explaining it any better; it's the three that have the "button" in the middle that you push in to release the pin.

I need to get some replacements that are the next size down (long story), but I'm having a hard time finding out the sizes. I'm seeing packs being sold that are anywhere from 10mm to 6mm.

Thanks in advance!

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