As far as I know, the only part of the EU where bananas are grown in any quantity is the Canary Islands, where the typical local banana is as short as they come. The Canaries are already beset with unemployment, and this (seemingly daft) directive would make things worse by removing the main market for their short bananas at a stroke.
Why would 'Brussels' want to do any such thing? Well, in the background you have the Gatt agreements which seek to re-organise world trade around macro-economic strategies, and agreements on imports of bananas are in fact alluded to in the article. An additional reason surely must be the Bland- Ubiquitous-Rubbery-Product marketing strategy (BURP), which short Canary bananas just don't fit into - they are to our usual jumbo bananas what garden-grown strawberries are to the swollen supermarket variety. So (given there may be macro-motives swirling around the humblest of fruit and the jokiest of journalism) could I just say: Brussels, no sizism please, and don't sweet-talk us, just give us the facts.