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Letter
SERVICE
2016
2017
Automation 5 Digit
.376
.373
Automation AADC
.399
.403
Automation Mixed AADC
.419
.423
Presorted (Non-Automation)
.452
.453
MAX.
5"
11 1/2"
HEIGHT
3 1/2" 6 1/8"
THICKNESS
.007"** 1/4"
LENGTH
**
hickness must be .009" or more if
T
more than 6" long, 4 1/4" high, or both.
Flat
SERVICE
2016
2017
Automation 5 Digit
.438
.446
Automation 3 Digit
.630
.630
Automation AADC
.670
.670
Automation Mixed AADC
.750
.750
Presorted (Non-Automation)
.798
.798
Postcards: Up to 1 oz
MIN.*
MAX.
LENGTH
11 1/2" 15"
HEIGHT
6 1/8"
12"
THICKNESS
1/4"
3/4"
HEIGHT
Flats: Up to 1 oz
MIN.
LENGTH
HEIGHT
Letters: Up to 3.5 oz
Mail Classes Defined
*
Flats exceed at least one
of these dimensions.
LENGTH
Flats are subject to flexibility standards. Can not be too
flexible or too rigid. Flat-size mail pieces must be uniformly
thick so that any bumps, protrusions, or other irregularities
do not cause more than 1/4-inch variance in thickness.
Postcard
SERVICE
2016
2017
Automation 5 Digit
.250
.253
Automation AADC
.263
.266
Automation Mixed AADC
.272
.274
Presorted (Non-Automation)
.283
.284
Shawmut Communications Group
978.762.7500 | www.shawmutdelivers.com
MIN.*
MAX.
LENGTH
5"
6"
HEIGHT
3 1/2"
4 1/4"
THICKNESS
.007"
.016"
HEIGHT
FIRST CLASS MAIL
Not sure what
these terms mean?
Check out our
helpful definitions
on the next page.
LENGTH
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Marketing Mail
(Formerly Standard Mail)
Letters: Up to 3.5 oz
Marketing Mail NONPROFIT
Letters: Up to 3.5 oz
SERVICE
2016
2017
SERVICE
2016
2017
Automation 5 Digit
.255
.251
Automation 5 Digit
.140
.134
Automation AADC/ADC
.274
.271
Automation AADC/ADC
.159
.154
Automation Mixed AADC/ADC-Origin
.291
.288
Automation Mixed AADC/ADC-Origin
.176
.171
Flats: Up to 3.5 oz
Flats: Up to 3.5 oz
SERVICE
2016
2017
SERVICE
2016
2017
Automation 5 Digit
.376
.387
Automation 5 Digit
.237
.244
Automation 3 Digit
.467
.478
Automation 3 Digit
.328
.335
Automation AADC/ADC
.522
.533
Automation AADC/ADC
.383
.390
Automation Mixed AADC/ADC-Origin
.539
.550
Automation Mixed AADC/ADC-Origin
.400
.407
Commercial Mailing Services Defined
AADC: Automated Area Distribution Center, a
presort level in which all pieces are addressed for
delivery in the same service area as the AADC. An
abbreviation is used on the mail label that identifies
the contents as Automated Area Distribution Center
mail (i.e., the ZIP Codes on the mail are served by
the AADC).
ADC: Similar to AADC, a presort level in which
all pieces are addressed for delivery in the same
service area, however that service area is only
served by an Area Distribution Center. The
difference between an AADC and ADC is the
volume of mail that goes through each center.
AADC/ADC: All pieces are addressed for delivery
in the service area of the same Automated Area
Distribution Center (AADC) or Area Distribution
Center (ADC).
Shawmut Communications Group
978.762.7500 | www.shawmutdelivers.com
Automation: Mail that is prepared in such a way
that allows the USPS to utilize their equipment to
read and distribute mail using a barcode, which
includes the delivery ZIP code.
Presort: The sorting of outgoing mail by delivery
ZIP code in order to take advantage of a cheaper
rate of postage.
Presorted (Non-Automation): Mail sorted by ZIP
code which meets USPS labeling standards but does
not meet postal automation criteria.
5 Digit: The delivery address ZIP code on all pieces
is the same 5 digit ZIP code.
3 Digit: The delivery address ZIP code on all pieces
begins with the same three digits.