4-5" is pretty small to go for a bass. For live bait you could use nightcrawlers and fish them like you would bluegill. In terms of artificial Berkley has some decent soft baits shaped like minnows that rig on a jig head. They're 3" inches long and come in a pack with 2 jig heads and 8 minnows. Shad pattern works best. This late in the year fish them slow and steady.

i would say some fat head minows about a 1/2 or 1 inch
or maybe some redworms. iv had littel bass hit bait there same size.

You got some good advice above--I'd fish em like your local panfish. I've had bass that size hit crickets. Your question brings me back about 40 years to when I fished our local park pond. I had to ride my bike across a main road that I wasn't allowed to cross. (Don't tell my mom--she still doesn't know).

Small crappie lures would be just the right size. They come in sizes from 1 - 2.5 inches, and most are made with some extra action that makes them enticing to bass as well.

My favorites are the little micro-grubs made by brands like Mister Twister. Multi-colored tube jigs work well too. Use a small jighead, around 1/32 oz.