One roll will last a very long time!
I cut about a centimeter of tape, which is a small rectangular piece that fits over the top of my finger-nail.
It is sticky on both sides but is made of a rubber-ee material that can form to your finger.
The tape stays attached to the pick after you put it on the first time.
When you take the picks off, there is no residue on your finger (unlike the Loctite Mounting Putty I used to use).
I put a piece on my Thumb-Pick, too.
You peel away the red stuff, and the tape itself is clear.
![Image](https://bb.steelguitarforum.com/userpix1712/987_Loctite_power_grab_1.jpg)