prettify-size is made available through jitpack.io.

There is mainly two way to integrate this plugin.

Use pom based repository for fetching plugin i.e

1. Add this in your pom.xml

<repositories>
	<repository>
	    <id>jitpack.io</id>
	    <url>https://jitpack.io</url>
	</repository>
</repositories>

2. If you are using private nexus repository then,
   2.1. Add https://jitpack.io as a new maven2 (proxy) repository in Nexus.
   2.2. Add that repository to Maven-public group.
   

Add this to your pom.xml file (make sure to change LATEST with the version in the JitPack badge above):

    <dependency>
		<groupId>com.github.aaabidunique</groupId>
		<artifactId>prettify-size</artifactId>
		<version>LATEST</version>
	</dependency>

or Add this to your build.gradle file (make sure to change LATEST with the version in the JitPack badge above):

    compile 'com.github.aaabidunique:prettify-size:LATEST'