On my 2000 Accord EX, two bumper cover clips were missing when I bought it. These are under the bumper, right under the headlight area or thereabouts. I tried to install 10 mm bumper clips, but they keep falling out. I tried two different types. Both work OK on other areas of the bumper cover.

So do these two bumper cover holes use a larger diameter clip??? I can't find anything larger than 10 mm diameter on Amazon.

 

Check and get the OE part number from the dealer, then put that into your search and see what comes up.