1.  Dear friends, Your customers are all over the world,so please  consider the transport time to different country . if want  faster,choose more faster shipping way, you can contact me to confirm which shipping method is best way. 2. it is a trans national transport. Through a very large number of transfers and 2-3 customs inspection, usually, the refunds of the time limited is  60 days(Mexico 80 days,Brazil 90 days). If there is a political or natural disaster (strike, typhoon), there may be an extension. 3. T-shirts are asian size,please consider the different size in different country, U.S size usually need one size up,  Europe size  usually need 1-2 size up . we all are seller , bigger size is better than small size. 4.I believe We can solve anything by good communication.