SPECIFICATIONS: Engine Start Stop Ring Color: Blue; Outer Diameter: 39.5mm; Inner Diameter: 30mm; Engine Start Stop Button Cover Color:Blue; Diameter:28mm. PERFECT MATCH！NOTE:Please check your Car Engine Start Stop size before purchasing. | EASY INSTALLATION:Product has an 3M adhesive tape, which can provide you convenience for the process of installation,just peel the other side of tape and stick to button tightly.Beautifully made with sturdy and durable rust-free silver chrome metal and embedded with 35&37 bright sparkling crystal rhinestones. | PERFORMANCE:Car engine start cover can give great protection for your car engine start button, and prevent the surface of interior engine start button from scratches, dust, keeping it clear and new all the time. | ATTENTION: The car bling sticker may don’t fit 2015/2016/2017 Honda Civic and some models of Mercedes/Nissan/Dodge/Jeep. Please check the diameter of your ignition button in your car before purchase to ensure that our car crystal rhinestone ring&Engine Start Stop Button Cover can fit your car perfectly. | WARRANTY:We promise 30 days 100% money back warranty for any reasons dissatisfaction plus 24 hours customer service. NOTE:Please check your Car Engine Start Stop size before purchasing.