Rashi on Bereshit 33:7 relates that, when Yaakov's family presented themselves to Eisav, the mothers drew near before the sons, but in Rachel’s case, Yosef preceded her .
...He said, “My mother has a pretty figure. Perhaps that scoundrel will set his eyes on her. I will stand in front of her and prevent him from gazing upon her....
And in Bereshit 49:22
אמר יוסף רשע הזה עינו רמה, שמא יתן עינו באמי, יצא לפניה ושרבב קומתו לכסותה,
Joseph said,“This scoundrel has a haughty eye. Perhaps he will take a fancy to my mother.” So he went ahead of her, stretching his height to conceal her.
My question is:
Being that Yosef was a 6 year old boy at the time (see Bershit 30:25 and 31:41 ) how could he conceal Rachel?
Was he really tall? Was Rachel short?