Postal Explorer >
IMM Issue 34 - International Mail Manual >
2 Conditions for Mailing > 260 Direct Sacks of Printed Matter to One Addressee(M–Bags) > 263 Weight and Size Limits
There is no minimum weight requirement for the entry of M-bags or International Surface Air Lift (ISAL) M-bags. The maximum weight limit for M-bags is 66 pounds, which includes the tare weight of the sack.
Note: Customers who tender M-bags that weigh less than 11 pounds are required to pay the minimum “11-pound bag charge” that is applicable to the country of destination where the sack and its contents are to be delivered.
There are no defined size limits so long as articles being sent can be enclosed in the mailbag.