Postal Explorer > Mailing Standards of the United States Postal Service, International Mail Manual > 2 Conditions for Mailing > 270 Free Matter for the Blind
Matter may be entered free of postage provided that at least one of the following criteria is met:
Note: An “organization for the blind” (see 271.1a) means an institution or association serving or officially representing blind persons.
The following weight limits apply to the mail classes identified in 273:
Maximum Weight Limit
Mail Service
4 Pounds
Priority Mail International Flat Rate Envelopes and Small Flat Rate Priced Boxes
First-Class Mail International
First-Class Package International Service
15 pounds
Priority Mail International parcels
Priority Mail International Medium and Large Flat Rate Boxes