Britain sent 880 punnets back to Spain in 1995 for being the wrong shape.
(The Sun, 4 March 1998, p6)
There are no rules, as such, about the shape of strawberries. A 1987 Commission regulation laid down quality standards for strawberries, setting out four classes, with conditions on minimum sizes for each class, freshness and lack of damage. The aim is to ensure that low quality produce does not reach the consumer. Wild and forest strawberries, those sold directly from farms and those for industrial processing are not affected. National and local inspectors are responsible for checking that the rules are respected and national governments set and levy fines as they think appropriate.