Courier Bag Sizes Explained: A4 vs A3 vs A2 (and What Fits in Each)

Choosing between A4, A3 and A2 courier bags is one of the most common questions we get from new vendors. Get the size right and your packaging looks neat and professional; get it wrong and you're either paying for space you don't need or forcing items into a bag that's too tight. Here's exactly what fits in each size, with the real dimensions EveryNaira Print prints to.

Courier Bag Sizes at a Glance

EveryNaira Print offers three courier bag sizes, all available in White or Black with your logo printed in up to 2 colours:

| Size | Dimensions | Best for | |---|---|---| | A4 | 22cm x 36cm | A single folded item, documents, small accessories | | A3 | 29cm x 48cm | 2–3 folded garments, a boxed pair of shoes, a hair bundle | | A2 | 40cm x 60cm | A hoodie or jacket, or several items in one dispatch |

A4 Courier Bags: The Smallest Option

A4 courier bags — sometimes called mailer bags or poly mailer bags — match standard A4 paper dimensions, which makes them a natural fit for documents. They're also right for a single folded T-shirt, a small bundle of hair extensions, or a handful of lightweight accessories. If you're dispatching one item per order and that item folds down small, A4 is usually the most cost-effective choice.

A3 Courier Bags: The Middle Ground

A3 courier bags give you noticeably more room — enough for 2 to 3 folded garments, a boxed pair of shoes, or a medium hair bundle order. This is the size most vendors reach for when A4 feels slightly too tight but A2 feels like overkill. If your typical order includes more than one item, or a single bulkier item like shoes in their box, A3 is worth considering before you default to the largest size.

A2 Courier Bags: For Bulkier Orders

A2 is EveryNaira Print's largest courier bag, built for bulkier single items like a hoodie or jacket, or for multi-item orders bundled into one dispatch. As a dispatch nylon or delivery nylon for larger parcels, A2 gives you the room to pack without forcing a seam or risking the bag tearing at the seal.

How to Choose the Right Size

Start with what you're actually shipping, not what "feels right." Lay your product out folded the way it'll travel, and compare it mentally against the dimensions above. A courier bag that's slightly too big is almost always a safer choice than one that's too tight — an overstuffed bag can split at the seal in transit, while a slightly roomy one just has a bit of slack.

If your order sizes vary — some customers buy one item, others buy three — it's worth stocking two sizes rather than forcing every order into the same bag. Many of our vendors keep A4 for single-item orders and A3 for anything bigger, switching to A2 only for genuinely bulky dispatches.

A common mistake we see from new vendors is ordering only the largest size "to be safe," then wrapping small items in extra layers of plastic to stop them shifting around inside. That ends up costing more per bag and looking less neat than simply using the size that matches the product. If you're unsure, order a small batch of your most likely size first, and adjust for your next batch once you've seen how it handles a real dispatch.

Courier Bags vs a Frosted Zipper Bag

It's worth knowing when a courier bag isn't the right tool at all. Courier bags are built for shipping and dispatch — tough, tamper-evident, and designed to protect an item in transit as delivery nylon. If your product is clothing or something meant to be presented nicely the moment a customer opens it, a frosted zipper bag is usually the better choice as the item's actual retail packaging, with the courier bag used as the outer dispatch layer around it for shipping.

Why the Right Size Saves You Money

Courier bag price rises with size because larger bags use more material. Choosing a size that actually fits your product — rather than defaulting to the biggest option "just in case" — keeps your per-order packaging cost down without compromising on protection. It also makes your parcels easier and cheaper to dispatch, since courier and logistics partners often price by parcel dimensions as well as weight.

Printing on Every Size

Whichever size you choose, EveryNaira Print prints your logo in up to 2 colours, included free, with a mock-up sent for your approval before anything goes to print. Design is free on every order, and minimum quantities start from 50 pieces regardless of size.

Ready to order? See live pricing for your chosen size on the courier bags page, message us directly, or fill in our quote form with your preferred size and quantity.