There's nothing wrong with the hides. They're just too big for him right now. I myself would swap them for two small clay pots with a hole knocked out for entrance.
Here's a site that helped me out when I was wondering about a cheap and efficient way to provide hides to my snake.

http://proexotics.com/FAQ_answers_Hide_Spots.html

And a video on how easy it is to make a hide spot.

http://proexotics.com/FAQ_answer_making_clay_hide.html