GRACE KARINElastic Waist Plaid Pants with Pockets

Do they have back pockets? If so, how deep are they?

Can this pants be worn for swimming in water?

I am 5'2 I want the pants to come down bit longer on the ankle and I weigh 156 what size should I get

I have 25 waist, but 39 hip. Which size should I get?