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This page describes products and general use; it is not medical advice.
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A 4×4 gauze pad is a square piece of gauze, nominally 4 inches by 4 inches, used to absorb fluid from a wound or to clean and cover a site. Buyers who order it in bulk are choosing among products that look alike but can differ in sterility, material and labeling. This page sets out what US federal regulation says about these pads, so a bulk order can be specified precisely. It covers pads and also bulk gauze rolls and other bulk gauze, because one regulation governs them all.
Who uses it: clinics, first-aid stations, long-term care facilities, emergency services and home users, and the staff who buy supplies for them. For the wider planning questions of moving to case-pack buying, see wound care supply wholesale buying; for the material itself, see what gauze is.
What a 4×4 gauze pad is
The US regulation 21 CFR 878.4014 calls the product a “nonresorbable gauze/sponge for external use”. It defines it as “a sterile or nonsterile device intended for medical purposes, such as to be placed directly on a patient’s wound to absorb exudate.” It consists of “a strip, piece, or pad made from open woven or nonwoven mesh cotton cellulose or a simple chemical derivative of cellulose.”
The “4×4” in the name is the nominal pad size in inches. The regulation does not set sizes, ply counts or pack counts, so those are properties a manufacturer or buyer states, not regulatory categories.
How 4×4 gauze pads are regulated
Under 21 CFR 878.4014(b), this generic device type is Class I (general controls) and is exempt from premarket notification (510(k)), subject to the limitations in 21 CFR 878.9. In practice that means a plain cellulose gauze pad of the regulated type does not need an individual FDA clearance before sale, but the manufacturer remains subject to general controls.
The exemption has limits. Under 21 CFR 878.9, a manufacturer must still submit a premarket notification when the device is intended for a use different from that of a legally marketed device of this type, or when it works using a different fundamental technology.
What falls outside the plain-gauze definition
The classification “does not include” gauze that contains added drugs such as antimicrobial agents, added biologics such as growth factors, or that is composed of materials derived from animal sources. A pad with an antimicrobial or a biologic added, or an animal-derived material, is therefore not the plain gauze described by this regulation, and the Class I exemption above is not stated to apply to it. A buyer who wants plain 4×4 pads should therefore make sure the product description does not name such an additive or material.
Sterile and non-sterile 4×4 pads
The same regulation covers both. 21 CFR 878.4014 describes the device as “sterile or nonsterile”, so sterility is a property of the specific product and its labeling, not a separate regulatory class of gauze. For how shelf life and dating apply to gauze, see whether gauze expires.
Bulk gauze rolls and other bulk gauze
Because the regulation describes “a strip, piece, or pad”, gauze rolls and strips sit under the same device type as pads. Bulk gauze rolls, bulk gauze and bulk 4×4 pads therefore share the same regulatory description, and the same checks below apply to each. Other dressing formats are covered separately in what a medical dressing is.
What to specify on a bulk order
The table lists items that follow from the regulation. Each row traces to the cited section.
| Item to state or confirm | Why it matters | Source |
|---|---|---|
| Sterile or non-sterile | Both fall under the same device type, so the order must say which is wanted. | 21 CFR 878.4014(a) |
| Material is open woven or nonwoven mesh of cotton cellulose or a simple cellulose derivative | This is the material the definition describes. | 21 CFR 878.4014(a) |
| No added drug (such as an antimicrobial), added biologic or animal-derived material | Such products are outside the regulation’s definition of plain gauze. | 21 CFR 878.4014(a) |
| Intended use is absorbing exudate from a wound as a dressing | A different intended use can remove the 510(k) exemption. | 21 CFR 878.4014(a); 21 CFR 878.9(a) |
Ply, pad count per pack and pack format are not set by the regulation, so a buyer writes them into the order explicitly. Minimum order quantities are covered in the dictionary entry minimum order quantity (MOQ), and choosing between dressing types in the wound care supply selection guide.
Common mistakes
- Treating sterility as implied. The regulation allows both, so an order that does not say “sterile” or “non-sterile” leaves it open.
- Assuming every gauze product is plain gauze. Products with added antimicrobials, biologics or animal-derived material are outside this definition.
- Reading “Class I, 510(k)-exempt” as “no rules apply”. General controls still apply, and the exemption is subject to the limits in 21 CFR 878.9.
FAQ
Are 4×4 gauze pads regulated by the FDA?
Yes. Nonresorbable gauze/sponge for external use is a Class I device under 21 CFR 878.4014 and is exempt from 510(k) premarket notification, subject to 21 CFR 878.9 (eCFR, checked 2026-11-01).
Are bulk gauze pads sterile?
Not necessarily. The regulation covers sterile and non-sterile pads alike, so sterility depends on the specific product.
Do gauze rolls follow the same rule as pads?
The regulation describes “a strip, piece, or pad”, so rolls and strips fall under the same device type as pads.
Does plain gauze include antimicrobial gauze?
No. The classification excludes gauze with added drugs such as antimicrobial agents, added biologics or animal-derived materials.
Sources
- eCFR, 21 CFR 878.4014, Nonresorbable gauze/sponge for external use: https://www.ecfr.gov/current/title-21/section-878.4014 (checked 2026-11-01)
- eCFR, 21 CFR 878.9, Limitations of exemptions from section 510(k): https://www.ecfr.gov/current/title-21/section-878.9 (checked 2026-11-01)
