30cm×5cm size meet international pottery studio requirements, validated across platforms for ceramic artists ' needs Rulers serve multipurposes for pottery measurement and artistic gift giving, helping organize messy workspaces while making ideal birthday or graduation presents for hobbyists This ceramic ruler set features unique ceramic design with 30cm hard scale marking and flexible extension, solving the fragility issues of traditional pottery tool for high frequency use Combines ceramic with flexibility for both straight measurements and curved surfaces adaptation, offering durability compared to single materials tool for craft enthusiasts Weighing only 50g with a flat profile for easy storage in toolkits or gift boxes, specially designed for mobile scenarios like outdoor workshops or teaching demonstrations