The fashion industry has been under fire in the recent years due to a lack of diversity and a trend in thinner and thinner models... Vogue Italia responded to the lack of diversity with a July issue like no other... but as far as the "too thin" issue, a new study may halt any progress:

The research shows that although ads showing thin models make women feel worse about themselves, they make the same women feel better about the brand featured. In fact, despite the negative effect on their body image, the women studied preferred ads showing thin models. And get this: They were more likely to buy products featured in the thin model ads than ones showing "regular-size models." 

With this said, there is no doubt that designers/brands will continue to cast thin models in their ad campaigns. 

*Image Source: IMGmodels.com