POSTCARDS:
• Minimum size: 3-1/2” high x 5” long x .007” thick
• Maximum size: 4-1/4” high x 6” long x .016” thick
– Best postage rate
– 1st Class automation (no postcard rate for standard mail)
– Oversize postcards are mailed as letters size not postcard rates
– Aspect ratio (length divided by height) must be at least 1.3 but no more than 2.5
   (if not, a non-machinable surcharge may apply)

LETTERS:
• Minimum size: 3-1/2” high x 5” long x .007” thick
• Maximum size: 6-1/8” high x 11-1/2” long x .25” thick
– All postcards are mailed as standard rate mail and will be mailed at letter size rates
   (no postcard rate for standard mail)
– Postcard shape mail that is > 4-1/4” high or 6” long must be at least .009” thick
– Aspect ratio (length divided by height) must be at least 1.3 but no more than 2.5
   (if not a non-machinable surcharge may apply)

FLATS:
• Minimum size: 6-1/8” high x 12” long x .25” thick
• Maximum size: 11-1/2” high x 15” long x .75” thick
– Best postage rate – Standard automation
– All postcards are mailed as standard rate mail will be mailed at letter size rates
   (no postcard rate for standard mail)
– Postcard shape mail that is > 4-1/4” high or 6” long must be at least .009” thick
 
MACHINABLE PARCELS:
• Minimum size: 3” high x 17” long x .25” thick – weight 6 or 8 oz
• Maximum size: 6” high x 34” long x 17” thick – weight 35 lbs
• Surcharge will apply for non-machinable parcels
Weight Maximums:
– 1st Class @ 13 oz.
– Standard Mail @ 16 oz.
– Parcel @ 35 lbs.
 
Other Information:
– 1st Class discounted mail must be NCOA
– Standard mail is required to be NCOA
– All 1st Class discounted and standard rate mail must be CASS certified.
• CASS certification is valid for:
• 5 digital coding @ 1 year (pre-sorted non-automation)
• DPBC coding @ 6 months ( automation)
• Car-rte coding @ 3 months (auto and non-automation)