Jeans and Fashion Questions

Hello,
I own 3 pairs of Rag and Bone Skinny jeans and they're all fine, except for one thing: waistband is slightly too wide for me, especially after having worn them a little while, so they tend to sit low on my hips and look a bit slouchy, which is all right.
Knees and ankles are all right, but around my calves, in my opinion they should be just a little bit looser. Do you have any suggestion on how to achieve this, just at the calves? Like when you stretch your jeans when still wet or damp, in order to loosen them? I don't know what to use to stretch just the calves...
Thanks a lot!