Size: Outer diameter of the ring is 1.5 inch; inner diameter of the ring is 1.25 inch; thickness is 0.12 inchTIPS: Please check the ignition button size in your car carefully before ordering to ensure that our car decor crystal rhinestone ring can fit your car perfectlyMaterial: This beautiful car decor crystal rhinestone ring made of high quality zinc alloy, which is sturdy and durable, and the 35 crystal decoration on it is made of rhinestone, which is shiny and beautifulApplication: with the adhesive interior ring, you can decorate your car engine start/ stop push buttons, car a/c knobs, radio switches, stick shift beautifully and easilyHow to use:1 .clean the installation site2 .tear off one of the tape film3 .aim at the bottom of the ring, and press it forcibly4 .tear off the film on the other side of the tape5. aim at ignition button and press firmly6 .successfully and beautifully