Alsol Lamesa Hot Shorts for Women Summer Lounge Shiny Metallic Pants for Party or Daily Life

What size would you recommend for 5’3” and weighing 135?

Is it hand wash or washing machine washable?

I am 5'5", weigh 120 and depending on brand, normally wear a small but sometimes do a medium. What would you reccomend?

What is the fabric content?