Jordan Kim
Jordan Kim Sustainability & Industry Editor at 4OVER4.COM
Question

Does EDDM postcard size affect postage cost?

Answer

Yes, size directly affects EDDM postage because it determines whether your piece is classified as a letter or a flat. Letters get the lowest EDDM retail rate, and flats cost more per piece.

ClassExample sizeCost
Letter6.5" x 9" and similar smaller sizesLowest EDDM rate
FlatLarger formats up to 12" x 15"Higher per piece

Both are far cheaper than addressed first-class mail, but on a large route mailing the per-piece difference adds up fast, so it is worth confirming which class your dimensions land in before you print.

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