Rose is likely to play on the wing for England U21 in the European Championships.
"Danny wouldn't be a top-class Premier League player in any other position but left-back," Redknapp said. "He wouldn't be a top wide left player, he wouldn't be a top central midfield player but I've said to him for a year now that he could be a top, top left-back.
"That's his position. He has a low centre of gravity, he is quick, he is aggressive and he's got a great left foot. He is a real left-back in my opinion and it will be a big competition next year between him and Benoît."