Can be used on either side. There is a rubber threading opening. You can replace it yourself. Approximately 17cm wide Approximately 9.5cm tall There may be slight differences in color between the image and the actual product. This is a handmade item by an amateur. There may be slight errors, distortions, or misalignments. Thank you for your understanding and consideration. Shipping will use recycled materials and be simple packaging. Thank you.