This plugin allows you to change the size of the players EnderChest, allowing you to store more or less than the vanilla version. It works the same way as a normal EnderChest just opening an EnderChest, but also features commands to access it. Everything can be customized with full color support, EnderChest title and chat messages.

Plugin Link:

https://www.spigotmc.org/resources/custom-enderchest.8868/