When I first started using tape for my fingers my go to was hockey tape, it was cheap and could get it anywhere.
The problem with hockey tape is that it is not meant for Jiu Jitsu and it would come off after 20-30 minutes of training.
So a friend introduced me to wartape back in 2015 after a tournament in New Jersey.
I commonly use the .5 inch tape for my fingers, i can depend on the long last adhesive to stay in place and not come off during hard training.
One of the things i love about the .5 inch tape is that it pre-cut in half so it is like two rolls in one.