This document explains how to enlarge a WS2812B LED matrix panel. It describes a DIY 16x16 pixel LED matrix unit that can be connected together using slide fasteners along the edges. Multiple units can be pulled together to create larger panels, such as connecting 2 units to make a 16x32 pixel panel or 4 units to make a 16x64 pixel panel. It also mentions using an SD card LED controller and power supplier to operate the enlarged panels.