Size 2 is HUGE. If you get these in size 2, they are NOT to big. Olive works very well for heavy trout, especially in high, slightly off color water. Besides trout, size 2 in both colors is very good for largemouth, smallmouth, pickerel, and pike.
This streamer has become one of my go to , big fish producers. in deep or fast water i wil often put an additional weight right at the head of the fly. This makes the fly run deep, and gives it an incredible fluttering action as the head drops quickly on an irradic retrieve. It is a big fish killer!!!