Often, adult midge patterns are the only fly that works to fool wary trophy trout, once they key in on small flies. One of these patterns, in the right color and size, is sure to be the answer for those tough fish. Per 3. Sizes: 20, 22, 24. Colors: Black, Grey, Cream. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Flies.