Commonly used tape sizes vary depending on usage scenarios and needs, the following are some common tape sizes:

1. Scotch tape: Usually used in offices and homes, the width varies from about 18mm (0.7 inches) to 24mm (1 inch).

2. Packing Tape: Used for packing boxes, mailing and shipping. The width is typically 48mm (2 inches), and the length can vary as required.

3. Double-sided tape: The common width is 6mm (0.25 inches) to 12mm (0.5 inches), and the length can vary according to different products.

4. Canvas Tape (Masking Tape): Typically used for painting and art projects, the width can vary from about 12mm (0.5 inches) to 50mm (2 inches).

5. Signing Tape: Available in various colors and widths for marking, identification and decoration. The width can vary from a few millimeters to a few centimeters.

6. Electrical Tape: Used for insulation and electrical repairs, usually in widths ranging from 18mm (0.7 inches) to 50mm (2 inches).