A4 Waist Challenge Instagram

Meet the “thigh gap” of 2016.

Photographs hashtagged with either “#a4waist” or “#a4waistchellenge” are sweeping across Chinese social media in what is the latest body-shaming meme. In it, women compare the width of their waists to that of the shorter side of a standard sheet of paper, which clocks in at 8.3 inches.

Since the “challenge” began gaining media attention, a number of users have reacted appropriately — by noting how ridiculous and unattainable it is. Below, some of the best reactions.