The phenomenon of ordered pattern formation is universal in nature.Among countless pattern systems, a snowflake is possibly the most fascinating example offered by nature.In this presentation, we will report that single-layered and single-crystalline graphene flakes (GFs) with highly regular and hexagonal symmetric patterns can be grown on a liquid copper surface using a CH4 chemical vapour deposition method [1].The family of GF crystal patterns shows a remarkable analogy to that of snowflakes,representing an ideal two-dimensional growth system.