I've caught flounder the on all sorts from small stick baits to curly tail grubs, 1 inch shads, isome in various forms, even mepps inched across the bottom. The secret is to find some fish! If there are flounder present they will grab a lure but there just aren't many flounder! Check the results of the flounder league comps, they are dire!. I fish spots which I know contain numbers of fish. My only tweak is that every artificial I use for flounder is used in conjunction with scent, I've watched flounder nose a bait and turn away but since using added scent once they get close instinct seems to take over and you're in!!! I use procure gel and it's made a massive difference to my catch rate. P.s....... If I had to choose just one it would be a white 2 inch curly tail grub and procure squid gel.