As a "bookmark," it discreetly fits in with the rest of your desk items without specifically standing out as a sensory tool. Run your fingertips across 4 different textured sections - small bumps, larger bumps, straight lines, and diagonal lines. The lines have a more mild feel while the bumps have a more pronounced feel for different levels of tactile input. Attach Velcro to the back of the bookmark and another piece of Velcro under the desk for sensory input for increased alertness.
As an added bonus, the bookmarks are soft and flexible - bend them, twist them, roll them, and fidget away.
6 inches long and .75 " wide. NOT meant for chewing.