LetterAgent

Mail physical letters by just asking your AI assistant.


Status: LetterAgent is currently in private testing ahead of public launch. Everything on this page describes the service as it works today.

Home > Guides > Photo card postage and thickness

Do photo greeting cards need extra postage?

Sometimes. A plain photo card in a standard rectangular envelope usually mails at regular letter postage, but heavy photo paper, rigid inserts, or a lumpy decoration can make it nonmachinable and trigger a surcharge. Weigh one finished card, envelope and all, and check it before mailing the batch.

What makes a photo card heavier than a normal card?

Photo paper is denser than plain card stock. A folded photo card prints the image on thick coated paper, and many photo cards add a second printed panel, a photo insert, or a separate letter sheet. Each layer adds weight, and weight is what pushes a card from one postage band to the next. A card that feels only slightly heavier in the hand can still cross a weight threshold once the envelope, the insert, and any decoration are added.

Finishes add weight too. Glossy coatings, foil stamping, and laminated surfaces are thin, but across a full card they add up. Glitter and raised textures add more, and they also change how the card moves through sorting machines: a rough or sticky surface can catch on belts and rollers. That is a separate problem from weight, and it can trigger hand handling even when the card is light.

When does thickness turn a card nonmachinable?

Sorting machines need a piece that bends. A card that is too rigid to flex through the machine's curves gets pulled out for hand sorting, and hand sorting carries the nonmachinable surcharge. Rigid inserts are the usual cause: a stiff photo mount, a cardboard backing, a gift card, or a small keepsake tucked inside the envelope can stiffen the whole piece beyond what the machine tolerates.

Uneven thickness causes the same result. A button, a ribbon knot, a dried flower, or a bulky bow creates a lump that the machine cannot pass evenly. Even a single thick embellishment near one edge can make the envelope bulge and jam. If you can feel a lump through the envelope, the machine will feel it too. For decorated cards, either leave the decoration off or mail the card in a padded envelope priced as a larger piece.

What you addEffect on postageWhat to do
Plain folded photo cardUsually regular letter postageWeigh one finished card to confirm
Photo insert or extra letter sheetExtra weight may raise the postage bandWeigh with all inserts included
Rigid backing or gift cardCan make the card nonmachinableExpect the surcharge, or send the gift card separately
Button, bow, or dried flowerUneven thickness, likely hand handlingUse a padded envelope and larger-piece pricing
Square photo cardNonmachinable by shape aloneAdd the surcharge, or choose a rectangular format

How do I check a card before mailing the batch?

Finish one card completely, exactly as the rest of the batch will look: card, photo, insert, letter sheet, decoration, and envelope, sealed. Weigh it on a kitchen scale and measure its thickness at the thickest point. Take that finished sample to the post office and ask for the correct postage. Then buy stamps in that value for the whole batch. This single check prevents the most common holiday-card failure: fifty cards mailed short because the sender weighed an unfinished card.

If the sample triggers a surcharge, you have two choices: pay it for the whole batch, or redesign. Removing a rigid insert, dropping a bulky decoration, or switching a square card to a rectangular one can each bring the card back to standard postage. The redesign choice is worth weighing when the batch is large, since a surcharge multiplied across dozens of cards adds up fast.

Does the same apply in Canada?

Yes, in principle. Canada Post prices lettermail by size, weight, and shape, and non-standard or oversize pieces cost more than standard lettermail. A thick or rigid photo card mailed from Canada may price as non-standard lettermail even if it looks like an ordinary card. The same finished-sample check applies: weigh and measure one complete card, and confirm the price at a post office before buying stamps for the batch.

International photo cards combine both problems: the weight and thickness rules of the sending country, plus international postage. A photo card that mails domestically at standard postage may still need extra postage abroad once its weight is counted in the international band. Confirm the international total at the counter for the first card, not after the batch is sealed.

Can LetterAgent mail my photo greeting card?

LetterAgent mails printed letters on standard letter paper in a double-window envelope, not greeting cards, so a photo card is outside what it sends. If your message fits a standard letter, describe it to your AI assistant, approve the exact quoted price, and it is printed and mailed to a US or Canadian address. For the photo cards themselves, the post office counter remains the right tool.

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Ready to mail it? Send your letter with LetterAgent: describe it to your AI assistant, approve the exact quoted price, and it is printed and mailed.


LetterAgent is a working name. Prices include print, postage, and our service fee. US prices in USD, Canadian prices in CAD (Canadian prices exclude applicable sales tax, added at checkout). Currently in private testing.

Need help? Ask your assistant: it can check a job's status any time. If it ever can't handle something: hello@getletteragent.com

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