Go to Document Library / List
Select Individual item/document
Click on “…” appears on the popup menu
Choose “Shared with”
Click “Advanced” option
Click “stop inheriting “.
Now delete or grant permissions as per your need. Done.
Setting up Item level permission for a list item or document in sharepoint 2013
Published
aanuwizard.com 
I looked forward to seeing this feature in the next SharePoint version when I worked on SharePoint 2010. Thanks for the great article.
Hi, our users can’t see the “advanced” option. Is there a specific permission level that a user needs to edit permissions on a document. At the moment they have “Contribute
When you click the first … it will open a preview of the doc. In the tray, there is another set of … dots. Click on those and you will see the Advanced options which will open the permissions for the document. Kind of like finding the start menu in Windows 8. Thanks to Aanu for posting this to lead me in the right direction.
In SP2010 this would set Limited Access permissions on the Library & Parent site. Doesn’t seem to be the case anymore in SP2013 ?
In SP2010 this would automatically set Limited Access permission on parent Library / Site. This doesn’t seem to be the case with SP2013?