Engine Start Button Size: 3.7 x 3.3cm/1.5" x 1.3"; Relay Box Size: 4.9 x 4.6 x 3.4cm/1.9" x 1.8" x 1.3". Universal design allows it fit for most vehicles. Great for your broken or demaged one. Premium Quality: Made of premium plastic material, this car engine start stop switch is sturdy, not easy to aging and abrasion, to ensure maximum strength and durability for long lasting usage.