I will look and see if I still have the box left from the ones I bought to confirm, but:

The easiest way to confirm though would be to bring the emblem with you to Lowes and do a dry fit. They should barely cut into the posts. If it looks like it is going to cut aggressively into the post, it is too small. If it is too small you risk breaking the post off. It does not take much to hold them in place firmly.

They are so cheap to bu locally, that if you buy extras the wrong size, who cares. It should cost you less than a gallon of gas would.