the best size hook for flounder?

Flounder fishing hook sizes can vary depending on the species of flounder and the size of the bait you are using. In general, it is best to use a hook size that is small enough to fit comfortably in the flounder's mouth but large enough to hold the bait securely. For small to medium-sized flounder, a hook size of #4 to #6 is typically used. For larger flounder, a hook size of #1 to #3 may be necessary.