Standard style: 18x40mm,38x35mm,20x60mm Any length can be cut between 20cm to 200cm. Our stretcher bars are designed for easy assembly, ... painting support. We recommend use of our Standard design stretcher bars cross braces for stretcher strips over 30", to maintain ... the canvas frames only 3/4 inch deep, so this style stretcher bars byname is canvas stretcher bar ,canvas stretcher, canvas frames ...