Our T-Shirts should be only washed with like colors. You can certainly machine wash them in warm water that is around 104°F/40°C. Keep in mind that you should only use non-chlorine bleach if necessary and do not iron the decorated/printed areas. If the T-Shirts require dry-cleaning, you can use any solvent except the trichloroethylene. Tumble-dry them on medium.
Measure under arms around the fullest part of the chest.
Be sure to keep tape level across back and comfortably loose.
Measure around natural waist with a measuring tape.