OVESPORTWorkout Shorts for Women Scrunch Butt Lifting High Waisted Yoga Gym Seamless Booty Biker Shorts

Can i wash these shorts in the washing machine?

The thighs in some pictures look like they've rolled up, is this intentional or from wearing them?

I have a 27-28in waist. Would a small or a medium be best to get, considering I like to feel hugged and supported but I don't want it to roll.

How long after ordering do these normally take to ship? I ordered over a week ago.