I'm looking at having a product tag made to stick on various projects that I send out the door as well as bikes.
I have the option to include a barcode on them that matches the serial number on each.
The choice is '3 of 9' or '128', I'm pretty sure theres an app available to track all this on my phone.

Does anyone here have any input to which might be more appropriate than the other for simple tracking of product?

thanks, jake