Don't nip anything off ... after each flower you may get a cucumber. Then no more will sprout from where you have taken a developed fruit. As the plant grows more will appear.
Don't wait until they get the size you buy them in the supermarket.
They taste a lot nicer half that size (around 5-6").
Mine are spouting daily and I have a fruit that is ready to eat within a week
At this point I am giving at least one a day away .. the neighbours love them .. so do I, but I cant eat them all !