I think you may need a corner protector for your windows because normally the corner of the window is always sharp and will hurt your head if you are not careful enough. At this moment a thin L shape corner guard is just right for you.
The corner protection are designed to match the thickness of the window cracks, help to prevent family members from being harmed. The design is reasonable. Every corner can be protected without affecting window sealing.
Strong adhesion: non-stick type, with glue inside, which can be peeled off and sorted in the place of use, simple and convenient.