What you get: 4 square PCB coasters plus 16 nonslip adhesive dots. Durable, readytouse set that's easy to or move as needed. Real circuitboard material: each coaster is made from an actual printed circuit board with rounded corners and visible electronic component traces. The authentic tech look serves as a unique conversation piece without compromising usability. Size and fit: each coaster measures approximately 3.54 x 3.54 x 0.08 inches (9 x 9 x 0.2 cm). Large enough to hold coffee mugs, drink cups, bottles, wine glasses and similar drinkware. Stable and protective: use the included nonslip dots to keep coasters in place and protect surfaces from scratches and condensation. The slim profile fits easily on desks, tables, and shelves. Practical gift for techminded people: a stylish, functional present for fathers, brothers, engineers, computer scientists, or anyone who appreciates electronicsthemed décor. Ideal for birthdays, Father's Day, housewarmings, holidays or office gift exchanges. Use scenarios: Home living room: place a set on the coffee table to protect wood surfaces while adding an industrial, techinspired accent. Office or home desk: keep one by your keyboard or monitor stand to hold your mug and reduce tabletop rings. Workshop or studio: use them in a maker space or lab to complement a techfocused workspace while keeping drinks secure. Materials, dimensions and contents are consistent with the original product specifications.