Large Styling Design Ruler, Straight Edge, French Curve Metric FRENCH CURVE RULER, SANDWICH PATTERN MAKING RULERS Size: 20-5/8 inches length & 6 inches wide (L x W) Thickness around 1,2 mm. Sandwich line, or printing on ruler cover Color is Transparent. Material is Flexible Plastic. PVC For fashion designers, tailors, fashion student, handicraft, pattern making, etc