Less painful than the ice bucket challenge and more flattering than the no make-up selfie, the watermelon dress is the latest photo craze to hit social media.

没有冰桶挑战那么痛苦，比素颜自拍更讨人喜欢，西瓜裙最近在社交媒体掀起新的晒照风潮。

All you need to partake is a watermelon, a cutting utensil¹ and a cheery pose - assuming you already have the phone and the Instagram account.

你分享照片所需要的只是一片西瓜，一把切西瓜的刀具，和一个愉快的造型，前提是你已经有了手机和Ins账户。

Fans of the #watermelondress hashtag have been showing off their handiwork, carving² couture frocks out of the green and red tropical fruit. And thanks to a little perspective, the illusion somehow works.

#西瓜裙主题标签的粉丝们在网上晒出他们的手工作品，他们用西瓜切出裙子的形状，借助视觉角度，让照片显示出错觉效果。

How does it work? Simple...the person charged with taking the photo simply holds the tiny juicy dress - cut from the skin and flesh of the fruit - close to the lens to create the illusion that the person in the background is wearing it.

这是如何做到的呢？很简单……拍照者简单地用手拿着小片的从瓜皮和瓜瓤中切下的西瓜裙，让它距离镜头近一些，看起来背景中的人物就好像穿着西瓜裙一样。

There are snaps of babies gurgling in what looks like a pink smock, men wearing full A-line skirts and ladies looking lovely in off-the-shoulder numbers.

网上晒出的照片中，有的婴儿就好像穿着一件粉罩衫，有的男性就好像穿了一件A字裙，还有的女性穿上露肩西瓜裙看上去美美的。

The genius of the watermelon dress appears to be the fact that the fruit's green skin makes a perfect hemline, and the easily-cut flesh can be shaped as you desire, with sharp lines and soft edges both popular.

西瓜裙的奥妙在于，绿色的瓜皮可以作为完美的裙边，而且瓜瓤很容易切成任何你想要的形状，硬朗的线条和柔和的曲线都很流行。

It isn't clear where exactly the trend began but it looks set to be the must-have snap of the summer, which is likely to be music to the ears of greengrocers everywhere.

西瓜裙何时开始风靡起来尚不得而知，但似乎将成为这个夏天的必备晒照样式，这对各地的蔬菜水果商贩来说可真是个好消息。