Whats the size of the door speaker on the 2003 Single Cab trucks?

And is there any other replacements that will work besides the stock size? thank you, i tried searching, but found nothing

 

Go to www.crutchfield.com and click on the "What fits my car" link. They will give you every optional size speaker that will fit your truck. If you buy from them they will usually send you the adapters (if needed) for free. I just bought a radio from them and couldn't be happier with their service. End of plug