To choose the right paper bag size, measure the product as it will actually be packed and compare its width, height and depth with the bag's internal space and gusset. Allow enough room for easy packing, tissue or protective material where needed, but avoid selecting a bag so large that the product shifts around or the presentation looks disproportionate. Product weight, handle construction and carrying distance should be checked separately, because dimensions alone do not determine whether a bag is suitable.
To choose the right paper bag size:
- Measure the product's width, height and depth.
- Include any box, tissue or protective material.
- Check the bag's gusset, not just its height and width.
- Choose a portrait or landscape format that matches the product.
- Check weight and handle construction separately.
- Test the real product in a sample bag before ordering in volume.
Bag size should follow the product
Businesses often choose bags by appearance, colour, size name, or by copying another retailer. Those are reasonable secondary considerations and poor primary ones.
The first step is always to measure the product as it will actually be packed, in its box, with its tissue, alongside whatever else goes in the same bag. Everything else follows from that measurement.
How are paper bags measured?
Three dimensions describe a paper bag:
Width - the horizontal measurement across the face of the bag.
Height - the vertical measurement from the base to the top opening.
Gusset (or depth) - the folded side and base expansion that gives the bag three-dimensional capacity when opened.
These are commonly written as Width × Gusset × Height, but conventions vary between suppliers and even between listings; some use Height × Width × Depth. Never assume the order. Confirm which figure is which before comparing two bags or ordering.
Publishing note: verify Smartbag's current dimension order and whether measurements are internal or external before this goes live. The previous version of this article used H × W × D.
What is a gusset?
The gusset is the folded side or base section that expands when the bag is opened out. It determines how much depth the bag has, and therefore whether a wide box, a food container, or several stacked items can sit properly inside.
It is the most overlooked dimension, and the most common cause of a bag that "should have fitted" not fitting.
- Narrow gusset - suits flat or slim products such as books, cards, stationery and folded garments.
- Wide gusset - needed for boxes, food containers and anything with real depth.
- Deep base - gives more stability for wider products that need to stand upright.
A wider gusset does not automatically mean a stronger bag. It means a bag with more internal depth, which is a different property entirely.
Measure the product before you measure the bag
- Measure the widest point of the product.
- Measure its height.
- Measure the total depth when packed.
- Add anything else going inside, tissue, protective wrap, the product box, a receipt, or additional items in a typical order.
- Allow practical packing clearance.
There is no universal "add two centimetres" rule. A rigid boxed item needs very little clearance; a soft garment that must be folded and placed needs more; something gift-wrapped in tissue needs more again.
Bag size is not the same as bag capacity
Two bags with near-identical dimensions can perform very differently. Capacity and durability depend on paper grade, base construction, handle attachment, gusset design, reinforcement and how the load sits inside.
A bigger bag is not automatically a stronger bag. Often the opposite: a larger bag encourages heavier loads while spreading the same handle attachment over more weight. Treat fit and strength as separate checks.
Portrait vs landscape
Portrait bags are taller than they are wide, suiting books, cosmetics, folded garments, tall boxed items and purpose-designed bottle bags.
Landscape bags are wider than they are tall, suiting folded clothing, gift boxes, shoebox-style products, homewares and wider presentation boxes.
Orientation should follow the product, not aesthetics. A wide gift box forced into a portrait bag will sit awkwardly on an angle, and a small item in a landscape bag looks lost regardless of how the bag looks empty.
Small, medium and large: what usually fits
These are indicative categories, not guarantees. Always check against actual boxed dimensions.
Small bags typically suit jewellery boxes, cosmetics, soap, candles, small accessories and gift cards. Be careful here; a "small candle" in a presentation box may still be too wide for a narrow gusset.
Medium bags typically suit folded shirts, books, beauty products, medium gift boxes, several accessories together and small homewares.
Large bags typically suit multiple garments, jackets, homewares, larger gift boxes and bulkier click-and-collect orders. They introduce new considerations though: carrying comfort, load on the handles, product movement, storage footprint and cost per unit all become more significant.
Sizing by product type
Jewellery and cosmetics
Measure the product box rather than the product, and factor in tissue and whether customers commonly buy several items together. A small portrait or gift format is the usual starting point — but a jewellery retailer selling watch boxes or gift sets needs considerably more room than one selling rings.
Clothing
Size by typical order rather than by garment:
- One accessory or small item - small to medium
- One folded garment - medium
- Multiple garments or bulky knitwear - large
- Suits, coats or large garments - larger or purpose-designed formats
Also account for hangers, tissue and garment covers if you use them.
Books
Books are deceptively heavy. Check width, height, thickness, the number in a typical order, combined weight and corner sharpness. A bag can physically fit four books and still be unsuitable for their combined weight, the clearest case where fit and strength diverge.
Candles, jars and beauty products
Check diameter, height, glass weight, stability when standing, leak risk and boxed dimensions. Where several jars travel together, use dividers or protective packaging rather than relying on the bag to keep them apart.
Takeaway containers
Base and gusset matter more than bag height. Match container width, length and height, the number of containers, how they stack, whether drink trays are involved, and total weight.
The base footprint is the critical measurement; a container that will not sit flat will tip regardless of how tall the bag is. Our café sizing guide covers container-by-container matching. [Internal link: Australian Café Sizing Guide]
Bakery products
Measure the box, not the food. A cake may be 20 cm wide and sit inside a 25 cm box. The same applies to pastry boxes, bread, cookies and multiple containers together.
Grocery and market purchases
Consider item count, combined weight, sharp corners on tins and packaged goods, and moisture from produce. Decide whether handles are needed at all, grocery formats without handles suit counter packing, bakery, produce and short carries at a lower cost per unit. Handled formats suit longer carries.
Wine and bottles
Use a purpose-made wine or bottle bag sized for the number and dimensions of the bottles. Check the product's stated capacity and construction rather than assuming a narrow general retail bag will safely hold glass. Single, double, and triple bottle formats exist for good reason.
Events and goodie bags
Start with the contents, never the bag. Measure the largest item, total quantity, weight, and anything bulky such as brochures, bottles or merchandise, then select the bag. Choosing a large event bag first and filling it with novelty items is the standard failure mode. [Internal link: Corporate Goodie Bag Ideas]
Click and collect
Consider typical order size, label placement, handles, product privacy, shelf footprint in your collection area, and stability when stacked. Most operations need two or three standard sizes rather than one universal collection bag.
How much extra space should you leave?
Enough that staff can insert the product easily, the customer can remove it without tearing the bag, the top can be folded if needed, and tissue can be added where appropriate.
Not so much that the product falls sideways, the bag looks empty, or packaging has to be added as filler. If you are using tissue to stop things rattling rather than to present them, the bag is too big.
How many sizes should you stock?
Rarely just one. But too many creates its own problems: inventory complexity, storage pressure, staff hesitating at the counter, and dead stock in sizes nobody reaches for.
Aim for the smallest practical set that safely covers most transactions, commonly small, medium and large, plus specialist formats such as takeaway or wine where needed.
Signs you need an additional size:
- Staff regularly double-bag
- Products regularly protrude from the top
- Small purchases go into obviously oversized bags
- Large items visibly stretch the handles
- Tissue is being used as filler rather than presentation
- Customers comment that bags are awkward to carry
- Staff substitute unsuitable formats to make an order work
What GSM means - and what it does not
GSM means grams per square metre. It describes the mass of the paper, and it is useful information.
GSM is not a load rating. Two bags of the same GSM can perform very differently, because strength also depends on fibre quality, construction, handle attachment, gusset design, base reinforcement and weight distribution. A well-constructed lower-GSM bag can outperform a poorly constructed higher-GSM one.
Paper weight also varies between products and sizes within the same colour range, so treat GSM as product-specific rather than category-wide.
Handle type matters separately from size
- No handle - grocery, bakery and counter service, packed fast and carried a short distance.
- Flat handle - common in takeaway and food service, quick to fold and seal.
- Twisted handle - common across retail and gifting.
- Rope handle - used on more structured presentation bags.
Handle types are not universally rankable by strength, because performance depends on how the handle is attached and reinforced on that product. Check the specification rather than assuming a hierarchy.
Test the actual bag before ordering in bulk
Order samples and run a real test:
- Pack the real product, in a realistic quantity.
- Lift it repeatedly.
- Carry it a realistic distance.
- Check handle comfort under load.
- Check whether the base deforms.
- Check for pressure from sharp corners.
- Test moisture exposure if relevant.
- Confirm the product does not shift excessively.
- Time staff packing it.
- Check how your branding sits on the loaded bag.
Score each sample
| Criterion | Question |
| Fit | Does the product go in easily? |
| Stability | Does it stay upright? |
| Carry | Is it comfortable to carry? |
| Strength | Does the bag stay intact? |
| Presentation | Does the product look proportionate? |
| Packing | Can staff use it quickly? |
| Storage | Is it practical to stock? |
A bag that scores well on presentation and poorly on packing speed will cost you at the counter every day.
Quick sizing reference
| Product type | Typical format to test | Main measurement |
| Jewellery/cosmetics | Small portrait | Product box width and depth |
| Books | Small/medium portrait | Weight and height |
| Folded clothing | Medium/large | Width and gusset |
| Gift box | Medium / landscape | Box dimensions |
| Takeaway | Wide-base bag | Container footprint |
| Bakery | Wide-base / grocery | Box width |
| Wine | Purpose-made wine bag | Bottle count |
| Click and collect | Medium/large handled | Typical order volume |
Always confirm against the exact product dimensions before ordering.
Smartbag size names
Smartbag's ranges use named sizes, Bambino, Toddler, Baby, Junior, Midi, Boutique and others. Useful shorthand once you know them, but not a substitute for dimensions. Work out the dimensions you need first, then match them to a named size.
| Smartbag size | Current dimensions | Typical use |
| Bambino | Verify live | Small boxed items |
| Toddler | Verify live | Cosmetics and small gifts |
| Baby | Verify live | Flat items such as books and stationery |
| Junior | Verify live | Medium retail purchases |
| Midi | Verify live | Larger retail purchases |
| Boutique | Verify live | Multiple or bulkier items |
Critical publishing note: every dimension in this table must be pulled from the live product page immediately before publication, along with GSM, gusset, handle type, availability and carton quantity. Do not carry over figures from the previous version of this article.
Choosing colour after size
Once size is settled, colour is a branding decision. Brown gives a natural kraft appearance, white a neutral background for colourful branding, and black strong contrast with more specialised artwork requirements. Our paper bag colour guide covers this properly. Where fit is critical, decide size before colour, not every size comes in every colour.
When a paper bag is not the right format
Paper is the wrong answer for courier shipping, sustained moisture, liquid leakage, very heavy or sharp goods, and products needing structural protection, or where a reusable system would serve customers better. Consider a mailing box, padded mailer, reusable tote, purpose-made food packaging, or no bag at all.
Common sizing mistakes
- Choosing a bag from a photo
- Looking only at bag height
- Ignoring gusset depth
- Measuring the product without its box
- Forgetting tissue and protective material
- Using one size for every order
- Assuming larger means stronger
- Assuming higher GSM guarantees load capacity
- Ignoring combined weight in multi-item orders
- Putting bottles in a general retail bag
- Choosing a takeaway bag without measuring the container footprint
- Ordering in volume before testing
- Using oversized bags because they look premium
- Relying on old published dimensions
- Ignoring storage space
Sizing checklist
Product
- Width, height and depth measured
- Packed weight estimated
- Largest common order tested
- Sharp corners considered
Bag
- Width, height and gusset checked
- Handle type selected
- Current product specification verified
Use
- Carrying distance considered
- Moisture assessed
- Food-contact requirements checked where relevant
- Multiple-item orders tested
Operations
- Sample tested with real product
- Staff packing speed tested
- Storage space checked
- Quantity forecast completed
Frequently asked questions
How do I measure a paper bag? Measure the width across the face, the height from base to opening, and the gusset, the folded side and base expansion that gives the bag depth. Check whether the listing states internal or external measurements, and confirm the order the dimensions are written in.
What does gusset mean on a paper bag? The gusset is the folded side or base section that expands when the bag opens, giving it three-dimensional depth. It determines whether boxes, containers, and thicker items will actually fit, and it is the dimension most often overlooked.
How much bigger should a bag be than the product? Enough to insert and remove it easily and add tissue if needed, without leaving so much room that the product tips or the bag looks empty. There is no universal allowance; rigid boxed items need very little, soft or wrapped items need more.
What size bag fits takeaway containers? Match the base footprint to the container dimensions and stacking pattern. Base width and gusset matter more than bag height. Include drink trays and total weight in the calculation.
What size bag should I use for wine bottles? Use a purpose-made wine or bottle bag matched to the number and size of bottles. Check the product's stated capacity rather than assuming a narrow general bag will safely carry glass.
Does a bigger paper bag hold more weight? No. Capacity depends on paper grade, construction, base reinforcement and handle attachment, not overall size. A larger bag often encourages heavier loads without any increase in structural strength.
Does higher GSM mean a stronger paper bag? Not on its own. GSM describes paper mass per square metre. Strength also depends on fibre quality, construction, handle attachment, gusset and base reinforcement, so two bags of identical GSM can perform very differently.
Are paper bag sizes measured internally or externally? This varies by supplier and listing. Check the product page, and ask if it is not stated; the difference matters when packing to a tight fit.