Why Did I Size Up

I just received 5, yes, 5 pairs of the TSV pants. I tried on one pair. I knew the thighs would be too large from reading the click here measurements but I did not expect the whole leg to be so big. What do I do? What would you do? Should I wash this one pair I have tried on to see if they shrink? Should I send them all back for the size I should have ordered? I know my Isaac size, it is one size smaller than what I ordered. I think I sized up because the pants looked tight on the models. The material is fab. By the time my exchange reaches the Q there will not be any pants left. Yee Gads!