It’s our responsibility to make the best underwear in the world. It is your responsibility to make sure you buy the right size clothes. We offer a size chart that anyone who can read can use to figure out the right size. Using a tape measure saves time, money and nerves both on your end as well as on ours. If you don’t trust the tape measure or your own experience and remain uncertain whether it is the right size after all, order just one pair. Don’t make an order for three or six pairs. If you cannot properly concentrate while ordering, try this: inhale, exhale, inhale –> continue the order when your thoughts are clear again.If, despite this, you end up ordering more than one pair (for instance three pairs) and want to change them all for bigger or smaller undies, please be advised that our satisfaction guarantee only applies to one pair. This means you get refunded for one pair. One hundred days satisfaction guarantee is NOT equal to one hundred days change guarantee.