The car headrest hook is 3.5 inches / 9cm long, 3.1 inches /8cm wide, 2.3 inches / 6 cm high, and the circumference of the hole is 2.3 inches / 6cm , suitable for most cars. The car hook is made of thick PP material, which is environmentally friendly, has no peculiar smell, will not scratch the interior of the car, has good toughness and is not easy to break. In addition to hanging wallets and bags, this wallet holder can also hold mobile phones, which can accommodate mobile phones less than 3.5 inches / 9cm wide.Note: Do not put the phone in the hook when the car is driving to prevent the phone from falling and breaking. Double hook design, one hook is equal to two, two hooks equal to four, can hang four bags or other things. The hook is a metal rod that passes through the back of the chair from the middle, so you dont have to worry about falling off, and you dont have to look for a hook every day. Note: Not suitable for heavy seats (over 1.37 inches from the bar to the back of the seat). Thicker hooks can help you keep your car tidy and organized. They can help you store wallets, shopping bags, garbage bags, clothes, etc., so you can have a neat riding experience. Purchase these highly durable car hooks. Each hook can easily support the weight of 44LBS (Unilateral 33LBS) and is suitable for most cars. Please do not put the mobile phone on the hook to avoid the mobile phone being broken during the vehicle form process. When installing, you need to use a little force to break the two sides of the hook up and down, which has been stuck into the pole. Specifications:Material: Thickened PP materialQuantity: 2 Pcs/Bag* Headrest HooksColor: BlackSize: 3.5*3.1*2.3 inces