When buyers ask about “paper thickness” for hanging files, they are usually trying to predict three things: how well the folder holds shape under load, how long it survives repeated sliding on rails, and whether it protects documents over months or years. The key is that thickness can be specified in points and GSM, and these measurements are not interchangeable without context.
Points describe the sheet thickness itself. In packaging and file-folder materials, 1 point equals 0.001 inch, so higher point stock generally feels stiffer and resists edge curl better. GSM describes grammage, meaning the mass per unit area measured in grams per square meter. The ISO standard commonly referenced for grammage testing is ISO 536, which defines grammage as mass per unit area expressed in g/m².
From a manufacturer’s perspective, the most useful way to present thickness options is to tie them to typical performance expectations in filing environments.
In mainstream filing systems, hanging file folders often use 11 pt class stock as an everyday baseline. Retail specifications for common hanging folders frequently list 11 pt paper stock. For higher durability, buyers typically step up to heavier point stocks, especially when folders are frequently pulled, refiled, or transported.
Here is a practical reference for commonly requested point stocks and approximate caliper equivalents. Point-to-inch conversion is based on the industry definition of points, while the GSM figures below come from a published paper weight conversion chart.
| Folder stock option | Approx. thickness | Approx. GSM reference | Best fit for |
|---|---|---|---|
| 11 pt | 0.011 in | ~270.9 gsm | Everyday office filing, moderate retrieval frequency |
| 14 pt | 0.014 in | ~308.5 gsm | Higher handling, heavier file stacks, longer service life |
| 15 pt | 0.015 in | ~312 gsm | Similar to 14 pt with a slightly firmer feel |
| 18 pt | ~0.0175 in | ~385.1 gsm | High-use drawers, heavier contents, frequent re-sorting |
A quick selection rule many project buyers use:
11 pt is the efficiency choice for large quantities and stable workflows.
14–15 pt is the durability upgrade when drawers are accessed daily.
18 pt is the “heavy rotation” option when folders are constantly moved or carry thicker bundles.
If your focus is suspension folders made from kraft-style board rather than standard paper stock, the thickness conversation shifts toward very high GSM kraft and surface treatments.
REXON’s kraft Paper File suspension folders are specified as being made from 1200 gsm kraft paper, aimed at strong handling and durability expectations for hanging systems. For buyers comparing products, this is useful because it signals a “board-like” stiffness level rather than typical light stock behavior.
REXON also positions these suspension folders as using archival-grade materials described as acid-free and lignin-free, which matters for long-term document preservation where yellowing and brittleness are concerns.
To avoid mismatches between “thick” and “works in our cabinets,” a good RFQ description usually includes:
Stock specification: point stock or target GSM range, plus whether you want kraft board or standard paper stock.
Use intensity: low retrieval, daily retrieval, or high rotation. This guides whether 11 pt or heavier stocks make economic sense.
Capacity expectation: standard capacity vs expanded use, because thicker folders also need strong folds and reinforced areas to avoid cracking over time. REXON lists multiple capacity classifications for suspension folders, including standard through archival categories.
Environment: humidity exposure and spill risk, which is why water-resistant surface treatments can be relevant in some offices.
Thickness is not just a material number. It affects rail glide, stackability, label readability, and whether the folder stays square as it ages. For suspension folders, REXON highlights smooth hanging behavior, capacity categories, and kraft material strength, which together help buyers standardize a filing system instead of purchasing mixed, inconsistent folder performance across drawers.
