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For most small parcels, Canada Post Regular Parcel is the cheapest door-to-door option, and items under 2 cm thick can go much cheaper as lettermail. Flat-rate Xpresspost boxes beat metered pricing once a parcel is heavy or large. Up front honesty: LetterAgent only sells flat-rate Xpresspost labels for parcels up to 5 kg, which is rarely the cheapest way to ship.
| Option | What it is | Best for | The catch |
|---|---|---|---|
| Oversized lettermail | Canada Post's letter service, for items up to 2 cm thick | Anything flat: documents, soft goods, small parts in a padded mailer | Strict size and weight limits; no tracking; no delivery guarantee |
| Regular Parcel | Canada Post's economy parcel service, with tracking | Light, non-urgent parcels of any size | No delivery guarantee; no included coverage against loss or damage |
| Expedited Parcel | The mid-tier service: faster than Regular, cheaper than Xpresspost | Business-style shipments where a few days are fine | Priced by weight and distance, so long hauls add up |
| Flat-rate Xpresspost box | One price regardless of weight or destination zone | Heavy or large parcels, especially going far (Toronto to Vancouver costs the same as across town) | More than the economy options for light parcels; 5 kg limit on LetterAgent labels |
This is the trick most people miss. If your item fits in a mailer under 2 cm thick and within lettermail weight limits, it ships as oversized lettermail for a fraction of parcel prices. A T-shirt in a poly mailer, a paperback book, a small stack of documents: all of these ride as mail, not as parcels. The savings are real because lettermail skips the parcel network's handling.
The rule is strict, though. Exceed the thickness limit and the item tips into parcel pricing at the post office counter, which costs more than buying the parcel service deliberately. Measure with a ruler before you seal the mailer. Soft items that squish under 2 cm are fine; a rigid box that bulges past it is not. And lettermail has no tracking and no guarantee, so only use it for things you can afford to lose.
Metered parcel pricing charges by weight and distance, which punishes heavy parcels going far. Flat-rate Xpresspost flips that: one price for the box no matter what it weighs or where in Canada it goes. The crossover point is roughly where the parcel is heavy enough, or the destination far enough, that the metered price climbs past the flat rate.
A dense little parcel like a bag of coffee beans going from Halifax to Victoria is the classic winner: metered pricing treats that long haul as expensive, while the flat rate shrugs. A light parcel going two towns over is the opposite: metered wins easily. Distance is the lever most people forget to pull when comparing prices.
One more thing flat rate buys: Xpresspost carries a delivery guarantee and includes a baseline of liability coverage, while Regular Parcel has neither. If the parcel matters, the cheapest sticker price is not the cheapest outcome.
Weigh it on a kitchen scale, measure the box, and get quotes for at least two services before you buy. Canada Post's online tools quote all the tiers at once, which takes a minute. Two specific habits save real money:
First, shrink the box. Parcel pricing punishes empty air, and a box that is one size too big can cost noticeably more than the same item in a snug package. Poly mailers for soft goods, smaller boxes for everything else. Second, drop off early in the day and avoid Friday afternoons for urgent items: not because of price, but because a missed cutoff turns a two-day service into a four-day one, which is how people end up overpaying for express they did not need.
Honestly, no. LetterAgent sells one thing: flat-rate Canada Post Xpresspost labels for parcels up to 5 kg, anywhere in Canada, with the price quoted up front and a label PDF you print yourself. That is not the cheapest option for a light, non-urgent parcel. Regular Parcel usually wins that race.
Where the label makes sense is speed plus simplicity: you ask your AI assistant, approve the exact quoted price, pay once through Stripe, and print the label. No account, no post office lineup, no surprise surcharges. If the parcel is heavy, going far, or time-sensitive, the flat-rate Xpresspost price is often competitive with metered options anyway. But if rock-bottom price is the only goal and the parcel can take its time, take it to the counter as Regular Parcel.
Ready to ship it? Get a shipping label with LetterAgent: describe it to your AI assistant, approve the exact quoted price, and get your label.
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.
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