Home
 

United States Postal Service

 
  General Address Standards
  Make Your Mail Machine Compatible and Readable
  Quick Service Guide
  United States Postal Service
   

Here are some fast facts to remember when mailing items:

The only FIVE Valid Ancillary Endorsements that the post office will accept are listed below:

"Address Service Requested"
"Forwarding Service Requested"
"Temporary Forwarding Service Requested"
"Change Service Requested"
"Return Service Requested"

If it doesn't have one of the above exact ancillary endorsements it's invalid.

Envelopes (Standard Sizes):
• The maximum size for an envelope to be mailed is 6-1/8 inches by 11-1/2 inches.
• The minimum is 3-1/2 inches by 5 inches.
• The largest postcard size you can send for 24¢ is 4.25" x 6". Postcards larger than this size will require regular letter rate postage of 39¢.

Postcards:
Size
• The maximum size for a postcard is 4-1/4 inches by 6 inches.
• The minimum is 3-1/2  inches by 5 inches.
• Sizes below that can not be mailed.
• Sizes above the maximum incur a surcharge.
• To stay within rates for standard letter-sized mail, a postcard can be no larger than 6-1/8-inches tall and 11.5-inches long.
• If its aspect ratio (length divided by height) does not fall between 1 to 1.3 and 1 to 2.5 inclusive you will be charged regular postage plus surcharge. (Example:  a square envelope or postcard that measures 6 inches x 6 inches would be charged regular postage plus surcharge.) This is considered Non-Standard Mail.

Nonstandard First-Class Mail and Third-Class Mail Size Limits. A piece of First-Class Mail or Third Class Single Piece Rate Mail is nonstandard if it exceeds any of the following size and weight limits:
• Its length exceeds 11-1/2 inches.
• Its height exceeds 6-1/8 inches.
• Its thickness exceeds 1/4 inches.
• It weights 1 ounce or less
• Its aspect ratio (length divided by height) does not fall between 1 to 1.3 and 1 to 2.5, inclusive.

Thickness
• Postcard thickness should be from .007-.016-inch.

Paper Quality
• Paper should be a smooth surface to avoid smudged or broken lettering on your address and message.  Certain types of coated paper or plastic papers should be avoided if the surface of the sheet is so glossy that it can prevent a postal-applied barcode from drying within one second.

Incompatible Materials and Sealing Methods
Certain types of materials must be considered incompatible with postal automation because they cannot be successfully transported at high-speed or won't allow the quality printing of a postal code.
• dark fibers, fluorescent or background patterns
• covering should have sufficient opacity to prevent extraneous printing on the inside of the mail piece from showing through in the OCR read area or barcode clear zone.
• paper with other than a smooth surface should be avoided if the texture adversely affects print quality.
• clasps, staples, string, buttons and similar protrusions should be avoided as methods of closing of letter mail.
• edge of letter mail should not be notched, scalloped or curved.

Address Printing Guidelines 
Simple sans serif are recommended for printing the delivery address because they are more easily read by OCRs.  As a general rule, type styles defined as light, bold, extended, or condensed should not be used.  Italic, BOLD, extended, condensed, highly-stylized and script-like styles should also be avoided.

Type Sizes
OCRs will read type sizes between 8-18 points.  The recommended type size is 10-12 point.

Word Spacing
To separate words, the OCR requires a space which is at least equal to the width of one full size character, such as a capital M.  Spacing between words should not exceed five full character spaces.  This includes spacing between the state abbreviation and the ZIP Code or ZIP+4 code.

Line Spacing
The OCR needs a space of at least 2 points between address lines.

Print Quality
Address characters should be clean, sharp, dark and uniformly printed.  Smudges, fill-ins, voids (inking gaps) within characters and extraneous ink outside character boundaries (splatter) can adversely affect OCR processing.  

Two-Letter State Abbreviations

Alabama  AL

Alaska  AK

Arizona  AZ

Arkansas  AR

California  CA

Colorado  CO

Connecticut  CT

Delaware  DE

Florida  FL

Georgia  GA

Hawaii  HI

Idaho  ID

Illinois IL

Indiana  IN

Iowa  IA

Kansas  KS

Kentucky  KY

Louisiana  LA

Maine  ME

Maryland  MD

Massachusetts  MA

Michigan  MI

Minnesota  MN

Mississippi  MS

Missouri  MO

Montana  MT

Nebraska NE

Nevada  NV

New Hampshire  NH

New Jersey  NJ

New Mexico NM

New York  NY

North Carolina  NC

North Dakota  ND

Ohio  OH

Oklahoma OK

Oregon  OR

Pennsylvania  PA

Puerto Rico  PR

Rhode Island  RI

South Carolina  SC

South Dakota  SD

Tennessee  TN

Texas  TX

Utah  UT

Virginia  VA

Vermont  VT

Virgin Islands  VI

Washington  WA

West Virginia  WV

Wisconsin  WI

Wyoming  WY

Secondary Address Unit Indicators

Apartment  APT

Building  BLDG

Floor  FL

Suite  STE

Room  RM

Department  DEPT

Street Designations Abbreviation
Alley  ALY Annex  ANX Arcade  ARC Avenue  AVE
Bayou  BYU Beach  BCH Bend  BND Bluff  BLF
Bottom  BTM Boulevard  BLVD Branch  BR Bridge  BRG
Brook  BRK Burg BG Bypass  BYP Camp  CP
Canyon  CYN Cape  CPE Causeway  CSWY Center  CTR
Circle  CIR Cliffs  CLFS Club  CLB Corner  COR
Corners  CORS Course  CRSE Court  CT Courts  CTS
Cove  CV Creek  CRK Crescent  CRES Crossing  XING
Dale  DL Dam  DM Divide  DV Drive  DR
Estates  EST Expressway  EXPY Extension  EXT Extension  EXT
Fall  FALL Falls  FLS Ferry  FRY Field  FLD
Flats  FLT Ford  FRD Forest  FRST Forge  FRG
Fork  FRK Forks  FRKS Fort  FT Freeway  FWY
Gardens  GDNS Gateway  GTWY Glen  GLN Green  GRN
Grove  GRV Harbor  HBR Haven  HVN Heights  HTS
Highway  HWY Hill  HL Hills  HLS Hollow  HOLW
Inlet  INLT Island  IS Islands  ISS Isle  ISLE
Junction  JCT Key  KY Knolls  KNLS Lake  LK
Lakes  LKS Landing  LNDG Lane  LN Light LGT
Loaf  LF Locks  LCKS Lodge  LDG Loop  LOOP
Mall  MALL Manor  MNR Meadows  MDWS Mill  ML
Mills  MLS Mission  MSN Mount  MT Mountain  MTN
Neck  NCK Orchard  ORCH Oval  OVAL Park  PARK
Parkway  PKY Pass  PASS Path  PATH Pike  PIKE
Pines  PNES Place  PL Plain  PLN Plaza  PLZ
Point  PT Port  PRT Prairie  PR Radial  RADL
Ranch  RNCH Rapids  RPDS Rest  RST Ridge  RDG
River  RIV Road  RD Row  ROW Run  RUN
Shoal  SHL Shoals  SHLS Shore  SHR Shores  SHRS
Spring  SPG Springs  SPGS Spur  SPUR Square  SQ
Station  STA Stravenue  STRA Stream  STRM Street  ST
Summit  SMT Terrace  TER Trace  TRCE Track  TRAK
Trail  TRL Trailer  TRLR Tunnel  TUNL Turnpike  TPKE
Union  UN Valley  VLY Viaduct  VIA View  VW
Village  VLG Ville  VL Vista  VIS Walk  WALK
Way  WAY Wells  WLS

Addressing

Address Format
(OPTIONAL) Non-Address Data FEL01225-66H
(OPTIONAL) Information/Attention MARY DURST
Name of Recipient MARY DURST WEB DEVELOPMENT
Delivery Address 317 W ELM
Post Office, State, ZIP LAKE CITY MN 55041

Post Office, State and ZIP Code Line:
For domestic mail, the post office (city), state and ZIP Code or ZIP+4 code should appear, in that order, as the bottom line of the address.

If all three elements cannot fit on one line, the ZIP Code or ZIP+4 code may be placed on the line immediately below the post office and state, aligned with the left edge of the address block. The standard two-letter state abbreviation should also be used.

Delivery Address Line:
The line immediately above the bottom line is the Delivery Address Line. The street address, post office box number, rural route number and box number, or highway contract number and box number should appear on this line. Mail addressed to the occupants of multi-unit buildings should include the apartment, suite, or room number (or other unit designation) immediately after the street address. If necessary to reduce the length of the Delivery Address line, the apartment number or other designator should be place don the line immediately above the Delivery Address Line. When use of a building name is necessary, it should also be placed on the line immediately above.

Dual Addressing:
Dual delivery addresses, such as a street address and a post office box, are not recommended. If dual addressing is used, one delivery designation should be placed on the Delivery Address Line and the other on the line immediately above. The mail will be delivered to the address on the Delivery Address Line. The ZIP Code, ZIP+4 code, or delivery point code should always reflect the address shown on the Delivery Address Line.

Name of Recipient Line:
The name of the intended recipient (business or individual) should appear on the line above the Delivery Address Line. This should be the third, fourth, or fifth line from the bottom, depending on possible overflow from the Delivery Address Line because of dual addressing as a department within a company.

Information/Attention Line:
The line above the Name of Recipient Line is optional for additional address information. It can be used to direct mail to a specific person or provide other information that will facilitate delivery, such as the name of a department within a company.

Foreign Addresses:
Mail addressed to foreign countries should include the country name in capital letters (no abbreviations) as the only information on the bottom line. For example:

MR THOMAS CLARK
117 RUSSELL DRIVE
LONDON WIP7HQ
ENGLAND