DickiesMen's Relaxed Fit Straight-Leg Duck Carpenter Jean

ok this will sound stupid. sorry. how do I measure to see what size i need? I haven't owned jeans for 25 years.

I have thick thighs and do not like when pants hug me, should I get a size bigger than I normally wear, or should my normal size do just fine?

Are these the lightweight or the heavy tougher material?

Are rhese pants made in Honduras?