PlayerInventory.changeInventorySize C# (CSharp) Method

    void changeInventorySize(int size)
    {
        dropTheRestItems(size);

        if (mainInventory == null)
            mainInventory = inventory.GetComponent<Inventory>();
        if (size == 3)
        {
            mainInventory.width = 3;
            mainInventory.height = 1;
            mainInventory.updateSlotAmount();
            mainInventory.adjustInventorySize();
        }
        if (size == 6)
        {
            mainInventory.width = 3;
            mainInventory.height = 2;
            mainInventory.updateSlotAmount();
            mainInventory.adjustInventorySize();
        }
        else if (size == 12)
        {
            mainInventory.width = 4;
            mainInventory.height = 3;
            mainInventory.updateSlotAmount();
            mainInventory.adjustInventorySize();
        }
        else if (size == 16)
        {
            mainInventory.width = 4;
            mainInventory.height = 4;
            mainInventory.updateSlotAmount();
            mainInventory.adjustInventorySize();
        }
        else if (size == 24)
        {
            mainInventory.width = 6;
            mainInventory.height = 4;
            mainInventory.updateSlotAmount();
            mainInventory.adjustInventorySize();
        }
    }