Depends on the silversides...real silversides are sold frozen in bait shops and frequently fresh in fishmarkets...Menidia menidia, family Atherinidae. While usually 3-5" long, some tackle shops may have leftover frozen "snapper" bait, 1-2" long. During the summer, 5 minutes worth of towing a 6' long seine net in a local bay will give you more than you could possibly use (I'd suggest frying them up...they are delicious....).What an LFS sells as "silversides" are some kind of white fish with black eyes, I believe it is a kind of anchovy...about 1-1.5" long, occasionally 2"....these can be bought very cheaply at any Asian market that you'd find in Chinatown, Elmhurst, or Flushing...they even have them at the market on 63rd drive. In the freezer section, but usually defrosted in the fresh fish section as well. Take care, Eric