ToomettWomen Swim Skirt Solid Color Waistband Skort Bikini Bottom

I'm 5'5 160 pounds packed mostly in the hips, with small waist. I don't like tight in the legs. What size should I order?

How do you unclasp the belt? I just received a pair and cannot figure it out.

How deep are the thigh pockets? Would they hold a large cell phone [6.12 inches tall]?

Does it get really hot due to the waterproofing?