actually you are completely wrong on this issue

the first class mail, weight can not exceed 13 oz,
Size limits:
- No more than 108 inches in combined length and girth

Which means, you can not mail heavy ( more than 13oz) and thick item using First Class Mail

所有跟帖： 

• 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