How long to brine herring just right?

Orange & Fennel Pickled Herrings with Fennel & Caraway Kichelach

Herring in Wine (12 oz.) - Acme Smoked Fish

Learn How to Brine & Rig Bait for West Coast Salmon - Pautzke Bait Co

Brine Bait Like A Boss - Island Fisherman Magazine

Norden Bismarck Herring, 18oz – Cook Swedish

Swedish Pickled Herring (or mackerel)

Any other pickled herring fans? : r/CannedSardines

Tracking the Elusive Bloater

Smoked Herring