These requirements are not guaranteed as the most current.
USPS seems to change their rules at random. You may need to call them to confirm specific information.
Bulk Mail tips
http://www.usps.com/send/postagepermitimprintsandmeters/tipsforusingapermitimprint.htm
Postal Phone list
Seattle Bulk Mail Center: 206-442-6092 Fax: 206-467-9019
Zip code conversion information: 206-326-4325
Business reply information: 206-652-2200 or 206-650-2100 FAX:206-652-2229
Renton Bulk Mail Center: 10-4 M-F 17200 116TH AVE. SE 425-226-5230
Postcards 1st class
Minimum thickness is .007
Smallest size 3.5 x 5 inches Largest size: 4.250 x 6 inches
Letters 1st class
Smallest size: 3.5 X 5 Largest letter size: 6 1/8 X 11 1/2 1/4 thick
Flats 1st class
Largest Flat size: 15 x 12 and 3.3 oz
Mailing Indicia formats (must have box)Non Profit Example
|
Non Profit Org
US POSTAGE
PAID
Your City
Permit No. 123
|
For Profit example
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PRSRT STD
US POSTAGE
PAID
Your City
Permit No. 123
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