Fit to burst

Really happy with how well my cucumbers are grown. I think they’ve grown a bit bigger than they are supposed to according to the picture on the seed packet.

I’m a bit worried that some of the flowers from tiny cucumbers, that haven’t developed properly, are starting to die and some of my very tiny cucumbers are starting to wither. I guess the energy is going into these bigger fruits. Wondering if maybe I should try and pick some big ones now? The big fruits don’t look like they wants to easily come off the vine and the flowers are still in full bloom. Advice?