The German defender is set to sign for Arsenal from Valencia for a fee of £35m and has played international football with two Arsenal stars - Per Mertesacker and Mesut Ozil.
However, Mustafi says that he had not spoken to Mertesacker as the player has retired from internationals and that Ozil - matched with Arsenal's playing style - persuaded him to join the Gunners.
"I did not see Per for a long time because he quit international football but I talked to Mesut," Mustafi told 'Sky Sports' in Germany.
"He told me everything I wanted to know. Everything was positive, so I was convinced very fast. It did not take much.
"I have always loved Arsenal, I like how they play here, it is not typical English.
"The game here is more like in Spain and with the German national team, keeping the ball on the grass, so it was easy to convince me".
Arsenal are looking for a centre half as Mertesacker and Gabriel are both currently out injured.