Pencil Skirt is a free application for macOS that specializes in creating straight skirt patterns, including a slit design. Users can enter essential measurements such as waist, hips, and skirt length to generate patterns tailored to their specifications. The application supports the addition of up to seven darts, with customizable distribution options that allow for precise adjustments.

The interactive interface enables users to edit patterns directly on the screen, providing real-time size adjustments. This feature enhances the user experience for both fashion designers and sewing enthusiasts, making the process of pattern-making straightforward and efficient. Pencil Skirt stands out as a valuable tool for those interested in garment design.