Eggs are a main-staple of a trout's diet, so having them in the Winter and Spring is a wise decision. Add one to your dropper while fishing a San Juan or Squirmy. Deadly. If you don't know what color to get, go with the McCheese, it works everywhere. Sold in packs of 6 and 12. Sizes small(16) and large(12). McFly Foam Colors: McCheese, Apricot, Early Girl, Roe, Steelhead Orange, White.