Sewing Ruler Set (4 Pcs) Metric Ruler Set French Curve Pattern Grading Ruler Dressmaking Drawing Drafting Measure Template Too|Herramientas de costura y accesorios| - AliExpress
Source Kearing brand, inch fashion design rulers, pattern grading ruler, 1"*6 length transparent inch scale for sewing design # B-50 on m.alibaba.com