well, figure out yourself: http://www.usps.com/prices/first-clas

http://www.usps.com/prices/first-class-mail-prices.htm

所有跟帖： 

• actually you are completely wrong on this issue -遠唯一- ♂ (224 bytes) () 11/13/2009 postreply 14:09:23

• 問題找麻煩的郵局營業員不是找重裏的茬，是找郵件體積的薦。 -小小愛茉莉- ♀ (0 bytes) () 11/13/2009 postreply 14:13:55

• you are wrong, if郵件體積is big, you need to use priority mail -遠唯一- ♂ (158 bytes) () 11/13/2009 postreply 14:19:14

• 此規定找到了，我很早以前看過 -小小愛茉莉- ♀ (288 bytes) () 11/13/2009 postreply 14:23:19