This stencil has 27 evenly spaced lines (each 10 mm apart) but you can space the lines out more by only drawing every second (or third) line.
The stencil is made from 1 mm thick bendable and flexible, high quality transparent plastic. It has rounded corners and is ideal for A4 paper in portrait orientation. This line guide also has a ruler on the side.
As most of practice paper for Arabic calligraphy is unlined, this stencil is extremely useful for turning plain paper into lined one quickly, making sure you have a reference line for your calligraphy practice.
Measurements: 297 x 205 mm / 11.61 x 7.95 inch