Dritz See-Thru Dressmaker's Ruler 4'' x 15'' is a must-have tool in every fabric designer's kit. Accurate numbering on this scale aids in making precise markings from 1/4" to 3.375". The scale also features a lightweight plastic material to facilitate parallel markings. It is great for measuring and marking specific locations of buttons, appliques, lace, pockets, buttonholes and can also be used as a tracing wheel guide. Details: Clear 4" x 15" Parallel slots for precision markings from 1/4" to 3.375" Measure and mark exact location of buttons, buttonholes, pockets, etc. Measure straight of grain from fabric selvages Measure and mark spacing for pleats and tucks Mark guide lines for decorative stitching Use to guide tracing wheel and pencil markings Simplify pattern alteration Measure and mark bias strips Plastic