Create fascinating patterns with the Farfi 21cm/25cm Ellipse Drafting Drawing Stencil Mechanical Ruler Oval Round Template. This classic art tool has been loved for generations and can turn math into beautiful art. By arranging and organizing the gears, you can easily draw a variety of amazing patterns. It's a fun way to learn math and design, suitable for both adults and children. The Mechanical Ruler is made of durable plastic and is easy to use. It is a professional tool that comes in two sizes: 21cm/8.27" and 25cm/9.84". The optional sizes are 22cm x 13cm/8.66" x 5.12" and 26.7cm x 15.2cm/10.51" x 5.98". Please note that there may be slight color and dimension differences due to light, screen settings, and manual measurement. Enhance your creativity with the Farfi 21cm/25cm Ellipse Drafting Drawing Stencil Mechanical Ruler Oval Round Template. Whether you're an artist or a student, this versatile tool allows you to easily create unique patterns and designs. It's a must-have for anyone who enjoys drawing and wants to add a touch of elegance to their artwork. Package Includes: 1 x Mechanical Ruler Key Features: Create fascinating patterns Turn math into beautiful art Durable and easy to use Comes in two sizes: 21cm/8.27" and 25cm/9.84" Optional sizes available Suitable for adults and children Enhance creativity Ideal for artists and students Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.