thoughtbot/paperclip — pull request #1584 by asteel1981 (2014-06-26 19:28:42+00:00)
Title: Adds AttachmentSizeValidator usage example.

Syntax is not clear from current documentation. This syntax works on my Rails 4, Paperclip 3.5.4 app. I found this syntax by guessing, but by all means if there is a cleaner syntax, please use that. Thanks for the great work!