3/8th and 5/8th wide seam allowance curve rulers by Claire Tharp ctharp1 on Etsy, $27.50 (3/8" = approx. 1cm, 5.8" = approx. 1.5cm)... GREAT FOR ADDING SEAM ALLOWANCES TO PATTERNS SUCH AS BURDASTYLE MAGAZINE / OTTOBRE etc. :) ! See info. about them on this blog: http://sacurveruler.wordpress.com/
Pattern Grading Tool - Grading Ruler ($8.00, Product # 21/22) by Connie Crawford. This ruler is intended to accompany the Grading Workbook (http://pinterest.com/pin/154318724701614957/). Made from clear plastic. The thickness is balanced to be not-too-rigid and not-too-thin.
The All New 5/8th Pattern Drafter by LunaGrafixCo on Etsy. We had the new version printed on a fluorescent yellow/green because it has a nice edge luminescence. Be sure to pin now and check it out later.