Strong adhesive can stick firmly to any flat surface, make sure the pen loop will not easily fall off, no worry about losing your favorite pens or stylusAdhesive piece dimension: 1.57 x 1.57 x 0.04 inch (4 x 4 x 0.1 cm). Ideal for most handwriting notebooks, calendars, journals, planners, diaries, iPad cases, tablet cases and othersElastic band is 0.6 to 0.9 inch (1.5 to 2.3 cm), perfect for holding most pens, pencils, stylus, Apple Pencil etc. (Pen with thick rubber grips might NOT fit)Made of premium PU leather, provides comfortable touch; Come with 5 packs, you could stick them to your diary, tablet case, refrigerator etc. (Pen loop holder only)Perfect for doctors, nurses, teachers, students, engineers, pilots, lawyers and etc.; Makes your work and daily life more convenient, efficient and neat