Width is the measure of the tape from one side of the roll to the other. Wide rolls make excellent packing tape because they cover more surface area. They are usually sturdier than narrow tape rolls. If you need tape for packaging or covering something up, choose the tape that provides the most surface contact with the material that you are taping up. This is especially important because post offices will note if your adhesive is insufficient. Moreover, if your packaging falls apart during transit, the shipping service may be unable to ship it.

The Complete Guide to Tape Adhesives