If you've ever ordered paper bags for your business only to find they're too small for your products, too flimsy for the weight, or so oversized that they look unprofessional at the checkout counter, you already know that getting paper bag sizing right matters. For Australian retailers, cafes, and ecommerce sellers, choosing the correct dimensions isn't just about fit, it directly affects cost per unit, customer experience, and how sturdy the bag feels in a customer's hand. This guide breaks down standard paper bag sizes, how they're measured, and which size suits which type of product, with a focus on the metric measurements used across the Australian packaging market.
What Are Standard Paper Bag Sizes?
Paper bags are generally grouped into four broad categories: small, medium, large, and extra large. Within the industry, dimensions are typically expressed using three measurements in a consistent order: Width × Gusset × Height.
This three-dimensional sizing exists because a paper bag isn't just a flat rectangle. The gusset, that folded panel on the sides of the bag, is what allows it to expand outward and create a stable base so the bag can stand upright and hold volume rather than just length and width. Without understanding all three measurements, it's easy to underestimate how much an item will actually fit.
In Australia, suppliers typically list dimensions in millimetres rather than inches, which is worth keeping in mind if you're comparing specs from international packaging guides.
How to Measure a Paper Bag
Before choosing a size, it helps to understand exactly what's being measured. Each paper bag has three core dimensions, and knowing how to read them takes the guesswork out of ordering.
Width
The width is the measurement taken straight across the front of the bag when it's laid flat. This is generally the first number listed in a size specification and gives you a sense of how wide an item can sit inside the bag without folding.
Gusset Depth
The gusset is the folded, accordion-style panel on each side of the bag. It's what gives the bag its depth and allows it to expand when filled. A deeper gusset means more internal volume and a sturdier base for items that need to stand upright, such as bottles, boxed goods, or bakery items.
Height
Height refers to the distance from the base of the bag to the top opening. This determines how tall an item can be before it pokes out the top, which matters both for presentation and for keeping contents secure during handling.
Small Paper Bag Sizes: Compact & Lightweight
Small paper bags are designed for lightweight, low-volume items where compact presentation matters more than carrying capacity.
Typical dimensions: Internationally, small bags tend to run from roughly 5″ × 3″ × 8″ up to 8″ × 4″ × 10″. In the Australian market, common metric equivalents include sizes like 150 × 90 × 270mm (small SOS style) or 210 × 80 × 155mm, depending on the supplier and bag style.
Best suited for:
- Jewellery and small accessories
- Gift items and small retail goods
- Bakery items such as cookies, pastries, and single muffins
- Small boutique or specialty store purchases
Weight capacity: Small bags generally handle around 1–3kg, depending on the handle type and paper weight (GSM) used. Twisted paper handles tend to hold less than flat or rope handles.
Medium Paper Bag Sizes: The Versatile Workhorse
Medium bags are the most commonly used size across general retail because they strike a balance between capacity and manageability.
Typical dimensions: Medium bags generally fall between 8″–10″ wide and 10″–13″ tall. In Australian metric sizing, this often translates to something like 157 × 100 × 310mm, depending on the supplier's range.
Best suited for:
- Folded clothing and apparel
- Shoes and shoeboxes
- Boxed retail products
- Office supplies and stationery
- General retail purchases that don't fit neatly into "small"
Weight capacity: Medium bags typically support 3–6kg, making them suitable for most everyday retail transactions without risk of tearing under normal use.
Large Paper Bag Sizes: Bulk & Heavy Items
Large bags step up in both volume and structural strength, making them suitable for heavier or bulkier purchases.
Typical dimensions: Large bags generally range from 12″–16″ wide and 12″–19″ tall. Australian equivalents commonly seen in supplier catalogues include sizes such as 240 × 120 × 390mm or 330 × 120 × 250mm.
Best suited for:
- Grocery and supermarket shopping
- Takeaway food orders, particularly multi-item orders
- Jackets, coats, and bulkier clothing
- Multiple smaller items bagged together
Weight capacity: Large bags are typically rated for 5.5–10kg, though this depends heavily on the paper weight and handle reinforcement used. Retailers handling heavier goods should check GSM specifications before assuming a bag will hold up.
Extra Large Paper Bag Sizes: Oversized Products
Extra large bags are built for bulk, oversized, or particularly heavy items where standard retail bags simply won't do the job.
Typical dimensions: Extra large bags generally start above 16″ in width. In the Australian market, sizes such as 305 × 175 × 430mm reflect the kind of dimensions used for bulk catering or large product packaging.
Best suited for:
- Bulk catering orders
- Large electronics or appliances
- Heavy winter coats and outerwear
- Oversized retail products that need extra structural support
Construction notes: Because these bags carry heavier loads, they're often reinforced with cardboard inserts at the base and use higher GSM paper, sometimes up to 200gsm, to prevent tearing or base failure under weight.
Paper Bag Size Chart: Quick Reference
| Category | Typical Width Range | Best For | Weight Capacity |
| Small | Up to ~8″ (approx. 150–210mm) | Jewellery, gifts, bakery items | 1–3kg |
| Medium | ~8″–10″ (approx. 157–250mm) | Clothing, shoes, boxed goods | 3–6kg |
| Large | ~12″–16″ (approx. 240–330mm) | Groceries, takeaway, jackets | 5.5–10kg |
| Extra Large | 16″+ (approx. 305mm+) | Bulk catering, electronics, coats | Reinforced for heavy loads |
Australian Supplier Size Examples
| Category | Dimensions (mm) |
| Small SOS | 150 × 90 × 270mm |
| Medium SOS | 157 × 100 × 310mm |
| Large SOS | 240 × 120 × 390mm |
| Extra Large SOS | 305 × 175 × 430mm |
| Small (supermarket style) | 210 × 80 × 155mm |
| Large (supermarket style) | 330 × 120 × 250mm |
How to Choose the Right Paper Bag Size
Selecting the right size comes down to a handful of practical factors rather than guesswork.
Start with your product. Consider the dimensions, shape, and bulkiness of what you're packaging. A flat-folded item needs different proportions than a boxed or irregularly shaped one.
Factor in weight. Match your expected product weight to the bag's load capacity. Ordering a lightweight small bag for a heavier item is a common cause of bag failure and customer complaints.
Consider gusset depth separately from width and height. A bag can be wide enough but still too shallow to hold volume comfortably, especially for items like bottles or boxed goods that need a stable base.
Think about branding. If logo visibility or print quality matters for your brand, larger flat surface areas on medium and large bags often display printing more clearly than smaller, narrower bags.
Weigh up cost and storage. Bigger bags cost more per unit and take up more storage space. If most of your orders are small to medium, stocking a smaller range of well-matched sizes is usually more cost-effective than defaulting to large bags "just in case."
Check the paper weight (GSM). Lighter 50–70gsm paper suits standard takeaway use, while premium retail or heavier items benefit from 120–200gsm stock for durability.
Frequently Asked Questions
What is the standard paper bag size? There isn't a single universal "standard" size, but small, medium, and large categories cover most general retail and hospitality needs. The right choice depends on what you're packaging rather than a one-size-fits-all default.
How do you measure a paper bag? Paper bags are measured using three dimensions in this order: width (across the front), gusset (the side depth that allows expansion), and height (base to top opening).
What is the gusset on a paper bag? The gusset is the folded panel on the sides of the bag that expands outward, giving the bag depth and allowing it to stand upright with a stable base.
What size paper bag for a shirt? A medium paper bag, generally in the 8″–10″ wide range, comfortably fits a folded shirt or similar apparel item.
What size paper bag for a takeaway meal? Large paper bags, typically 12″–16″ wide, are well suited to single or multi-item takeaway orders, particularly when boxed meals or multiple containers are involved.
What is the strongest paper bag size? Extra large bags are generally the most structurally reinforced, often using higher GSM paper and cardboard base inserts to support heavier, bulkier loads.
Choosing the right paper bag size doesn't need to be complicated once you understand how width, gusset, and height work together. If you're unsure which size fits your specific products, browsing by size category or requesting a custom quote can help match your packaging to your actual order volumes and product range.