This is about laying down standards for producers. In particular:

EUR-Lex - 31994R2257 - EN

the purpose of these standards is to ensure that the market is supplied with products of uniform and satisfactory quality, in particular in the case of bananas harvested in the Community, for which efforts to improve quality should be made.

"In the Community" would cover the French overseas departments of Martinique and Guadeloupe, for instance. It's to be expected that the big producers, like Chiquita, Dole, etc, were already applying similar standards, simply because, in their industrial perspective, it is counter-productive to work with plantations that turn out heterogenous material in terms of packaging, transport, and final consumer acceptance.

Now, either you regulate in matters like these or you leave it to "the market". In any case, you'll note that all fruit (in the US and Europe, at least) is sold in carefully-measured sizes. It seems 1) industrial process; 2) marketability 3) regulations where they exist, concur to produce a similar result.

Are industrial process or free markets held up to ridicule for laying down measured standards?