Bulk Bag Dimensions: Why 90×90×110 Doesn't Fit Every Product

The industry-standard FIBC runs about 90×90×110 cm and holds 500–3000 kg, with 1 ton and 1.5 ton the most common ratings. But those numbers describe what’s common, not what’s correct for a specific product. Whether a quote calls them jumbo bag dimensions or simply the size of a bulk bag, the same rule applies: bag size is set by bulk density, not by a lookup table — dense products often need a mini bulk bag rather than a part-filled standard one — a dense mineral and a light powder at the same target weight need meaningfully different volumes.

Typical Size Ranges by Capacity

Target capacity	Approximate volume needed*	Typical footprint	Typical height
500 kg	~0.5–0.6 m³	85×85–90×90 cm	80–100 cm
1000 kg (1 ton)	~1.0–1.1 m³	90×90–95×95 cm	100–120 cm
1500 kg	~1.4–1.6 m³	100×100–105×105 cm	120–140 cm
2000 kg	~1.8–2.0 m³	105×105–110×110 cm	140–160 cm
3000 kg	~2.6–2.9 m³	110×110–120×120 cm	160–190 cm

*Assumes a mid-range bulk density around 900–1000 kg/m³. Lighter or denser products shift these numbers — see the calculation section below for the actual formula.

Sizes in Inches

Super sack, FIBC and bulk bag name the same product, so the size ranges above apply whatever the quote calls it. US quotes switch to inches, cubic feet and pounds — the common 90 × 90 × 110 cm bag is about 35 × 35 × 43 inches, or 31.5 cubic feet. For standard inch sizes with verified cubic feet, and which products reach the weight rating before the bag is full, see the super sack dimensions guide. Empty bag weight is covered under tare, net and gross weight.

What Actually Determines Bag Size

Bag volume, not bag weight rating, is the real constraint — you’re sizing a container for a given volume of product, and weight is just volume times bulk density. Two products rated for the same 1000 kg can need very different bag sizes: a dense mineral powder at 1400 kg/m³ needs less volume than a light plastic pellet at 500 kg/m³. Always start from bulk density, not from a generic “1 ton bag” assumption.

The 90×90×110 cm Bag Is Common, Not Universal

This footprint became the de facto industry default because it fits standard pallet dimensions (roughly 1m × 1m) and stacks efficiently in a container, and because 1 ton is the most frequently ordered capacity. But “standard” here means common, not fixed — suppliers vary the exact centimeters, and plenty of products need something else entirely.

Loop Type Changes the Usable Height

The four lifting loops attach at the top corners or sides, and loop height adds to the bag’s overall dimension without adding usable fill volume. A bag with tall, four-corner loops has a larger overall height on a spec sheet than a bag with short side-seam loops at the same fill capacity — when comparing dimensions across suppliers, check whether the quoted height includes loops or measures the body only.

Two quotes listing the same overall height can hide a 10–15 cm difference in body height, so ask for body height and loop height as separate figures.

Fabric Weight Doesn’t Change Size — It Changes What Size Can Safely Hold

Two bags with identical dimensions can carry different rated loads depending on fabric weight (GSM) and safety factor. A 90×90×110 cm bag in 140 g/m² fabric and the same footprint in 210 g/m² fabric aren’t interchangeable even though they measure the same — the heavier fabric carries more weight and tolerates rougher handling. This is also why “dimensions” alone is never a complete spec: two suppliers can quote the identical footprint at very different prices because one is proposing lighter fabric for a single-trip use case and the other heavier fabric for repeated handling.

Filling and Discharge Style Affects Usable Space

Duffle top (gathered and tied closed), spout top (a discharge spout for pouring), and flat bottom all use the same base dimensions differently. A spout adds height at the top or bottom without adding storage volume, and a flat-bottom bag trades some corner volume for stacking stability. Two bags with the same headline dimensions can offer different usable volume.

1 Ton vs 1.5 Ton: The Two Most-Ordered Sizes

1 ton (1000 kg) and 1.5 ton (1500 kg) cover most general bulk shipments — construction aggregates, agricultural inputs, industrial minerals — because they balance forklift handling limits against fewer bags per shipment. Beyond 2 tons, handling equipment and site logistics become the limiting factor more often than the bag design itself; confirm your site’s lifting capacity before ordering above 2000 kg.

Ordering a size outside these two common ratings isn’t a problem, but it changes the sourcing conversation. Standard 1-ton and 1.5-ton footprints are already tooled at most factories, so lead time is typically shorter. A less common capacity or an unusual footprint may need new tooling or adjusted stitching patterns, which is worth flagging early rather than discovering at the quote stage.

How to Calculate the Right Size for Your Product

1. Find your product’s bulk density (kg/m³) — check the product datasheet or measure it directly (weight of a known volume).
2. Divide target weight by bulk density to get required volume in cubic meters. Example: 1000 kg ÷ 800 kg/m³ = 1.25 m³.
3. Add 10–15% headspace so the bag doesn’t need to be packed to its absolute limit, which strains seams and makes tying off harder.
4. Convert volume to a footprint and height that fits your pallet and container plan — a supplier can do this step for you once you send the volume figure.
5. Confirm safe working load and safety factor separately from the size — dimensions and rated capacity are two different checks, not one.

A worked example: a fine mineral powder at 650 kg/m³ bulk density, target weight 1000 kg. Required volume is 1000 ÷ 650 = 1.54 m³, noticeably more than the 1.0–1.1 m³ a denser product needs at the same weight. Sizing this bag off a generic “1 ton bag” chart without checking density would produce a bag too small to hold the actual load without overfilling past the safe fill line.

Common Sizing Mistakes

• Sizing off a generic chart instead of actual bulk density. The chart above is a starting reference, not a substitute for the calculation.
• Packing to the bag’s absolute volume limit. Skipping headspace strains seams and makes the top harder to close, especially on duffle-top bags.
• Assuming a custom size costs proportionally more. Custom footprints mainly affect lead time from new tooling, not necessarily per-bag price at volume — ask for a quote rather than assuming.

Decision Checklist

• Do you know your product’s bulk density, or only its target weight? Get the density figure before requesting a size.
• Does your pallet or racking system constrain the footprint? State that limit upfront.
• Are you comparing quotes with different reported heights? Confirm whether loop height is included.
• Does your container loading plan favor a squarer profile? Ask about baffle construction to hold shape at your target size.
• Is your target capacity outside the common 1–1.5 ton range? Flag it early — larger custom sizes usually need a longer lead time to tool.

Final Thoughts

Bag sizing comes down to one number most buyers don’t have on hand: their product’s bulk density. Once you have it, footprint and height follow arithmetic instead of guesswork — and the generic capacity chart becomes a sanity check rather than the answer. If you’re working from a target weight and only a rough sense of your material, send us both. We’ll run the volume calculation and come back with dimensions matched to what you’re actually packing.

Before You Request a Quote

Send these details so a size can be quoted accurately:

1. Target weight per bag
2. Product bulk density, or enough detail for us to estimate it
3. Pallet or container constraints, if any
4. Fill and discharge style preference (duffle, spout, flat bottom)
5. Whether you need Type A standard construction or a different static/certification class

Request a quote with these specs and we’ll confirm dimensions against your actual product, not a generic chart.