Your chinos are made for you to be able to do whatever you want in them. These 5 tips will just be helpful in extending the life of your favorite pair of Mugsy chinos.
Most guys order the same waist size they normally wear in other pants (hint: this is probably you).
If you're between sizes or prefer a stylish fit, size down (Mugsys are crazy flexible).
If you prefer a looser fit or have Thor-like-thunder-thighs, order a size up and wear them with a belt (only ~1-2% of dudes do this).