They are pretty small but work great if you place your bike right up against a narrower type pole railing.
My absolute favorite bike locks ever made, I do love these things.
I typically will use all 6 when locking my bike, one for each tire and four on the frame.
Its about buying more time for you to get your ass out of the store and not so much about permanent long term all day/overnight security.
The more locks you use at once the more you will inconvenience thieves.