Self-adhesive pen holder: The self-adhesive loops have a strong back glue that allows you to easily stick these pen holders to any clean, smooth surface and keep them sturdy. The pen holder is suitable for journals, notebooks, planners, calendars and it can be hung on these books. Elastic Design: The leather pen loop is designed with elastic bands that can be firmly attached to pens or pencils of different sizes. You can choose to secure your pen in place to prevent the pen from getting lost and make your life easier as needed. Adjustable design: The pen holder has strong holding force, flexible rubber band, adjustable circle diameter, and the elastic ring is suitable for different types of pens and pencils. Multiple colors: the size of the pen holders is 4 x 4 cm and the size of the loop is 1.7 x 1.5 cm. Ten different colors including black, fruit green, pink, dark green, gray, sapphire blue, dark blue, brown, purple, red. So you have more options to match notebooks in different colors. Widely used: the perfect partner for laptops. Fits all diaries or notebooks. It can clip onto books, notebooks, journals, calendars, etc.