The "16x" designation refers to the pack's resolution, which matches the standard Minecraft pixel density of 16x16 pixels per block. In the PvP scene, 16x packs are highly valued for several reasons:
Shortened swords to increase screen visibility and distinct particle effects for critical hits. jadeite (intel edits' 150k) - ruby 16x
Often featuring dramatic, high-contrast nebula or cloud designs. The "16x" designation refers to the pack's resolution,