DEVOPSMen's Thermal Underwear Long Johns Set with Fleece Lined

Do you have a Size chart for 44" waist and 28" long pants?

Do the pants have a fly opening?

Do a small size fits a 30” waist like me?

Will 2xl fit someone with chest 48 inch, waist 49 inch and hip 51 inch? Thank you so much for your help!!!