The antonyms for the phrase "more full length" can be a variety of words depending on the context. If the meaning is related to clothing, antonyms could be "cropped," "short," or "mini." In terms of video content, the antonyms could include "truncated," "edited," or "abridged." The opposite of "full length" when it comes to music could be "single," "EP," or "remix." Ultimately, the antonym for "more full length" is heavily influenced by the specific use of the phrase and the intended meaning. However, generally speaking, anything that suggests a shorter or edited version of the original term could be considered the antonym.