- Short answer
- Yes, per carrier: Shopify's FedEx page sets 6 × 4 × 0.5 in for labels from a US location, and seven European carrier pages name their own.
- FedEx scope
- Every FedEx label bought from a US location, not only One Rate.
- Europe
- Seven carrier pages: DHL Paket, Colissimo, Correos, Mondial Relay, Chronopost, Poste Italiane and DHL Express.
- Envelope or soft pack
- Envelope: flat, no thicker than 3/4 in. A soft pack over 3/4 in loses USPS First Class Mail rates.
- Carriers that refuse them
- Mondial Relay and Chronopost take boxes only; Poste Italiane and Canada Post through Shopify take no envelope.
- Below the minimum
- No page we read describes an error; price adjustments are documented (Canada Post international: missing rates may mean non-compliant packaging).
Who sets the minimum — Shopify or the carrier?
The carrier — but Shopify prints it on its own Help Center page for that carrier. The FedEx page, read September 13, 2026, says "Packages shipped with FedEx must have the following minimum dimensions": 6 in long, 4 in wide, 0.5 in high (15 × 10 × 1.2 cm).
That covers every FedEx service bought through Shopify Shipping from a US fulfillment location, not only FedEx One Rate.
What minimum does each Shopify Shipping carrier page name?
Eight carrier pages, read September 13, 2026 — one US, seven European:
- FedEx, US location — 6 × 4 × 0.5 in (15 × 10 × 1.2 cm)
- DHL Paket, Germany domestic — 15 × 11 × 1 cm (6 × 4.4 × 0.4 in)
- Colissimo, France domestic — 16.1 × 11.1 × 1.1 cm (6.3 × 4.3 × 0.4 in)
- Mondial Relay, France domestic — 15.01 × 10.1 × 1.51 cm and 0.201 kg (0.44 lb)
- Chronopost, France domestic — 30.1 × 21.1 × 3.1 cm and 201 g (0.44 lb)
- Correos, Spain domestic — a box over 10.1 × 15.1 × 1.1 cm
- Poste Italiane (Poste Delivery Business Express and Standard), Italy — height of at least 1 cm (0.39 in)
- DHL Express, every European origin — 10 × 15 × 1 cm (3.9 × 5.9 × 0.4 in)
On the German page, DHL Kleinpaket has its own minimum, different from DHL Paket's — read the row for the service you buy.
What if your item is smaller than the minimum?
Put it in a box that meets the carrier's minimum. Shopify's packaging page separately defines two flat package types: an envelope, "A large, flat envelope no thicker than 3/4 inches." and a soft pack, a padded mailer or sleeve, which loses USPS First Class Mail rates above 3/4 in. Neither definition says a flat pack is exempt from a carrier's minimum.
Not every carrier takes flat packs: Mondial Relay and Chronopost take boxes only, Poste Italiane takes a soft pack but no envelope, and Canada Post through Shopify takes no envelope.
No Shopify page we read on September 13, 2026 — the eight carrier pages above plus Shopify's packaging, label-buying, rates and billing pages — describes an error for a parcel under the minimum; what they document is a price adjustment when the carrier measures a different size than you declared — plus one note on the packaging page: if Canada Post international rates don't display when you fulfil, your packaging might not meet Canada Post's requirements.
An unavailable label button has other causes — see why you can't buy a shipping label on Shopify.
This article was written entirely by AI under human editorial direction. The editor sets the topic and structure, runs multi-stage validation on facts, links, and interactive elements, and verifies the output is useful from a business perspective. All claims are checked against official Shopify sources. Details may change — always confirm critical data at shopify.com.
Editorial Policy