Will I be able to exchange these Hollister jeans ( DETAILS INSIDE ] !? PLEASE HELP ! BEST ANSWER 10 POINTS !?

I bought two pairs of Hollister Laguna Skinny jeans in a size 3 long but they are too big and I think I need either a 1 long or a 0 long , I wore 1 pair Saturday and 1 pair friday , and then I realized that they were WAY too big in the waist and legs so pretty much just too big all around ! , Will they let me exchange the jeans for a smaller size , I didn't get anything on the jeans or anything ? I have the receipt , but the tags are not still on the jeans . Thanks !