Not that it matters
For the life of me, I can't think of a single time in Star Trek where the outcome of a story has hinged upon the actual length of the Enterprise in meters.
, but off the top of my head I'd say the E-D's escape from the dyson sphere doors in RELICS qualifies, and you could probably say the same thing about the refit's passage out of the spacedock doors in SFS.
(though I still maintain the latter is a blown visual opportunity. A narrower cross-section presented to the slowly opening doors would have been more exciting, like Sulu putting the ship through a-quarter of a slow barrel roll.)