About This Complete Measurement Set: 2-piece scale ruler kitincludes standard ruler + ceramic shrinkage scale.Dual-scale toolkit meets all professional and DIY measurement requirements in one package Premium Material Quality: High-quality ceramic clay for pottery offers flexibility + stability with enhanced toughness. Ceramic shrinkage ruler features smooth edges and soft texture for long-term durability without breakage Precision Graded Scaling: 4-scale ceramic rulerprovides 6%/10%/12%/14% shrinkage ratios.Accurate clay scale delivers consistent results from 0-33cm (0-12.99 inches) with clear markings Clay Modeling Specialization: Ceramic modeling rulermeasures cylinders/arcs precisely. Multifunctional scale ruler suits beginners to experts - essential for pottery, sculpting, and 3D art projects Multi-Material Compatibility: Clay shrinkage scaleworks with polymer clay, ceramics, and resins.Versatile standard rulerensures reliable dimensional control for kiln-fired and air-dry projects