Nitrile examination gloves are specified by thickness and measured dimensions, not by GSM. GSM, meaning grams per square metre, is an areal weight used for flat sheet materials such as nonwovens and fabrics, and it does not appear in the standard that governs nitrile examination gloves. The numbers worth reading on a glove are the single-wall thickness in mil or millimetres, the glove's width and length, and the material and powder specification.
That mismatch is why glossaries that list "density, GSM and thickness" side by side can mislead a buyer. Two of those three terms describe sheet goods. Only thickness, together with the material and the measured dimensions, describes the glove itself.
How is glove thickness measured?
Thickness is given as a single-wall measurement, in mil or millimetres, and it is taken at defined points on the glove - typically the finger and the palm - because the material is not the same gauge everywhere. One mil is one thousandth of an inch, or about 0.0254 mm. The table below converts the common product positions on a nitrile exam glove.
| Nominal thickness | In millimetres | Typical position in a product line |
|---|---|---|
| 3 mil | about 0.076 mm | Lightweight, for short, low-demand tasks |
| 4 mil | about 0.102 mm | Standard examination and general clinical use |
| 5 mil | about 0.127 mm | Heavier duty, longer wear, more demanding handling |
| 6 mil | about 0.152 mm | Heavy-duty handling where a thicker gauge is wanted |
A clinic buying to a specification will normally see thickness written as a nominal figure plus a minimum: the nominal figure is the design target and the minimum is the floor the material may not fall below, which is why a "4 mil" glove is described by both numbers.
Does GSM apply to gloves?
For a nitrile examination glove, no. GSM measures the mass of a material per unit area, which is meaningful for a flat, continuous sheet - a nonwoven drape, a wrap, a wipe - and not for a moulded, three-dimensional glove. The standard for nitrile examination gloves addresses dimensions, thickness and performance rather than areal weight. The table below separates the terms that are often listed together.
| Term | What it actually measures | Does it specify a nitrile exam glove? |
|---|---|---|
| Thickness (mil or mm) | The single-wall gauge of the material | Yes - a primary specification |
| GSM (g/m squared) | Mass per unit area of a flat sheet material | Not part of the glove standard |
| "Density" | Mass per unit volume of a material | Not a standard glove specification; thickness and dimensions are |
| Dimensions (width, length) | The fit of the glove | Yes - measured on the finished glove |
| Material and powder | The polymer and any powder content | Yes - part of how the glove is described |
Where a supplier advertises a glove by "GSM", the number is usually borrowed from a sheet-goods metric and is not a substitute for the thickness and dimensional specifications a buyer actually needs. The practical check is to ask for the single-wall thickness at the finger and palm, and the glove's width and length, rather than an areal weight.
How are medical gloves regulated in Canada?
Medical gloves are treated as a regulated medical device in Canada. Health Canada states that medical gloves are classified as Class II devices, and that this is the case "whether the gloves are made of latex, vinyl, synthetic polymer or nitrile, or are sterile or non-sterile". That places nitrile examination gloves in the same regulatory class as their latex and vinyl equivalents, and it means the manufacturer must hold a medical device licence before the gloves can be imported or sold.
The technical standard behind a nitrile examination glove is ASTM D6319, the specification for nitrile examination gloves for medical application. Its scope is the glove itself: the requirement is evaluated on the finished product rather than on the raw material. In the United States, the equivalent general categorisation appears at 21 CFR 880.6250, where a non-powdered patient examination glove is described as a disposable device worn on the examiner's hand or finger "to prevent contamination between patient and examiner", and is placed in Class I. A buyer comparing a Canadian and a United States listing is therefore looking at two regulatory frameworks applied to the same physical glove.
Which thickness fits which task?
Thickness is a trade-off between tactile sensitivity and durability, and the right choice follows the task rather than a preference. A thin glove gives more feel and is suited to short examination or handling steps; a thicker glove resists tearing and stands up to longer or more abrasive tasks. What matters more than the headline number is consistency: the glove should be the thickness it claims, at the finger and the palm. The nitrile examination glove range covers several thicknesses in the same blue exam format, and the wholesale and institutional account page is the entry point for a facility standardising one specification across sites.
Clinics that also reprocess instruments keep those records in one set - load, service, malfunction and package labels - and the printable sterilization log sheet and label generators build them without an account.
Have a question about your own facility? Send it in and you will get a written answer specific to your setup, with the regulation or standard it is based on cited. Ask your compliance question.
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Frequently Asked Questions
Do nitrile gloves have a GSM rating?
No. GSM is a mass-per-area figure used for flat sheet materials such as nonwovens and fabrics, and it is not part of the standard for nitrile examination gloves. Nitrile gloves are specified by single-wall thickness, measured dimensions, and material.
Is a higher mil number always better?
Not necessarily. A thicker glove resists tearing and suits longer or more abrasive tasks, while a thinner glove gives more tactile sensitivity. The right gauge follows the task, and consistency at the stated thickness matters more than the headline number.
How thick is a 4 mil nitrile glove in millimetres?
About 0.102 mm, since one mil is one thousandth of an inch, or about 0.0254 mm. The exact figure depends on whether you read the nominal target or the minimum for that product.
What standard covers nitrile examination gloves?
ASTM D6319, the standard specification for nitrile examination gloves for medical application, which addresses the finished glove rather than the raw material.
Are nitrile examination gloves regulated in Canada?
Yes. Health Canada classifies medical gloves as Class II devices, whether they are made of latex, vinyl, synthetic polymer or nitrile, or are sterile or non-sterile.
CliniEco Medical holds Medical Device Establishment Licence MDEL #35334. This article summarises published standards and regulator material for information only; it does not replace the glove manufacturer's instructions, the applicable medical device requirements, or the direction of the relevant regulator for a specific product.
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