Hi,

At the moment we are developing our WeChat Mini-program, however when sharing design specs with developers we are unable to share using WeChat's measurement units, only iOS and Android are supported.

You can find out more info about WeChat's rpx measurement units here:

http://open.wechat.com/cgi-bin/newreadtemplate?t=overseas_open/docs/mini-programs/development/framework/view/wxss