This Horizontal Lattice  pattern case is one of suitable fun cases for iphone 6 plus.

The  idea of using unfixed Rhinestone works fine and helps the design in a cute way.

iPhone 6 Plus Case, G-i-Mall [Luxury Fashion Series]

Bling Colorful Moving Diamond Rhinestone Protective Shell  Hard Back Case

iPhone 6 Plus Case, G-i-Mall [Luxury Fashion Series] Bling Colorful Moving Diamond Rhinestone Protective Shell  Hard Back Case for Apple iPhone 6plus Cover  with Horizontal Lattice  - Black