the fiberglass repos are from forms that have been made from other fish. the exact measurements are really not that important. you can always lie like most fishermen and add several inches and pounds to your fish. they paint the fish, so you can have them paint it bright or dark. if you catch a fish that you want to have made into a form, you should lay it in a box surrounded with fine shaved ice. the trick is to keep the fins in good shape and moist. when the fins dry out in a freezer, they curl up and are hard to form