Not less than 2.3cm If it is less than 2.3cm, the storage groove will be squeezed, making it impossible to place items. （But if you don’t need a groove for placing items, you can place the product with the bottom facing up, and it can be used normally. The rendering is as follows. If the width of your seat gap is less than 2.5cm, and you don’t need a groove for placing items , then you can buy with confidence, the renderings are as follows）