Cinedicta do not have a standard length. Their length is as varied as that of aphorisms in literature, but, obviously, they should be very short. The most common air time for cinedictum is less than three minutes. In brief, the shorter the cinedictum, the longer the reflection on it.
Cinedicta are great, precisely because they are so short. Their strength lies in their weakness.
Here is what the best minds of our age said about brevity:
Shortness is the sister of talent. Anton Chekhov
Brevity is the soul of wit. William Shakespeare
Beauty is eternity in a flash. Albert Camus
Art is always a limitation. The sense of any picture is in its frame. Gilbert Kit Chesterson
From two words - choose a smaller one. Paul Valerie
Better say less, but well. Kozma Prutkov