I’m using Toolset Types plugin for collecting attachments to the post. The plugin gives the URL path of my attachment. I needed to display the size of my attachment in my template. This plugin did the job. Other places I looked, we needed the ID of the attachment from the DB and it was a complicated and probably SQL-heavy way to query the wp database to find the ID from the URL. This plugin accomplishes the task without needing to check the database (I checked the plugin code.. no db lookup)