Beckham had been training with Arsenal before making the switch.
"Beckham is a world brand and the eyes will be on him, and on PSG, therefore also on the French league while he is there," Wenger said.
"Is he ready to play at the moment? I believe he has to go through physical preparation and it will take him a few weeks to be completely match fit.
"I don't know if he had offers from all around the world, but PSG is not a bad choice because they are a very ambitious club, who have a lot of potential. They look to extend their reputation at the moment, and Beckham certainly is a good part in that."