Principal Display Panel: Required Declarations, Type Size, and Placement

The principal display panel requirements come from two federal regulatory schemes: the FDA’s rules at 21 CFR Part 101 for food, drugs, and cosmetics, and the FTC’s rules at 16 CFR Part 500 for most other consumer commodities sold by weight or measure. Whichever applies, the panel most likely to face a shopper on the shelf must carry three declarations — the statement of identity, the net quantity of contents, and the name and place of business of the responsible company — sized, placed, and set off according to specific rules. Miss any of them and the product is misbranded under federal law.

What Counts as the Principal Display Panel

The FDA defines the principal display panel (PDP) as “the part of a label that is most likely to be displayed, presented, shown, or examined under customary conditions of display for retail sale.”¹ The FTC uses nearly identical language for non-food consumer commodities at 16 CFR 500.2.²

How that plays out depends on the container:

On a rectangular box, the PDP is usually the entire front face.
On a cylindrical container such as a can or jar, the PDP is 40 percent of the circumference — the portion most likely to be displayed at retail.²
On an oddly shaped container, the largest surface area that would face a shopper generally serves as the PDP.

A manufacturer may designate more than one PDP when multiple sides could reasonably face out, but each alternate panel must repeat every mandatory declaration. The panel also has to be large enough to hold the required text without crowding. A PDP so tight that mandatory information competes with graphics for space can itself support a misbranding finding.

The Three Required Declarations

Statement of Identity

The statement of identity tells the consumer what the product is. Under 21 CFR 101.3, a packaged food must bear the name established by federal law or regulation. If no such name exists, the label uses the common or usual name; failing that, a descriptive term, or a fanciful name the public commonly recognizes for that food.³ The identity statement must appear as a principal feature of the PDP. It cannot be buried under a brand name or marketing phrase that obscures what is actually inside.

Net Quantity of Contents

The net quantity declaration states how much product is in the package, not counting the container. For FDA-regulated food, 21 CFR 101.7 requires that it appear on the PDP “as a distinct item” in the bottom 30 percent of the panel, in lines generally parallel to the base the package rests on.⁴ The FTC applies the same bottom-30-percent rule at 16 CFR 500.6.⁵

Liquids must be stated in fluid measure and solids by weight, unless a well-established trade custom dictates otherwise. Contrary to a common assumption, dual U.S./metric declarations are not required for FDA-regulated food. Metric is permitted; 21 CFR 101.7(p) says a metric statement “may also appear” on the PDP or other panels.⁶ Most manufacturers include both to broaden market reach, but the regulatory floor is a U.S. customary declaration.

Name and Place of Business

Every consumer product label must identify the responsible company. For food, 21 CFR 101.5 requires the name and place of business of the manufacturer, packer, or distributor.⁷ The FTC imposes the parallel obligation at 16 CFR 500.5.⁸

The place of business must include the city, state, and ZIP code. A street address is required unless it can be found in a publicly available directory or database. If the company named did not actually manufacture the product, a qualifying phrase such as “Manufactured for ___” or “Distributed by ___” must appear. A corporation must use its actual corporate name; a partnership or sole proprietor uses the name under which it does business.⁷

Measuring the PDP Area

The PDP’s area controls the minimum type size for the net quantity declaration, so the measurement has to be right. Under 16 CFR 500.21, area is measured by the side or surface bearing the PDP, excluding tops, bottoms, can flanges, and bottle shoulders and necks.⁹

Rectangular container: height times width of the chosen side.
Cylindrical container: height times circumference, times 40 percent.
Irregular shape: the actual area of the side most likely to be displayed.

Document the calculation and keep it on file. An error here cascades into the wrong type size, which can push an otherwise compliant label into misbranding.

Minimum Type Size for the Net Quantity Statement

Both agencies use the same tiered scale, tied to PDP area. The net quantity text must be at least:

1/16 inch (1.5 mm) tall on a PDP of 5 square inches or less.
1/8 inch (3.1 mm) on a PDP over 5 up to 25 square inches.
3/16 inch (4.7 mm) on a PDP over 25 up to 100 square inches.
1/4 inch (6.35 mm) on a PDP over 100 up to 400 square inches.
1/2 inch (12.7 mm) on a PDP over 400 square inches.

These thresholds apply identically under FDA and FTC rules.⁴¹⁰ The size must also be uniform across packages of substantially the same size, so a manufacturer cannot shrink the font on one run and enlarge it on another.

Placement, Prominence, and Prohibited Terms

Type height alone is not enough. The net quantity declaration must appear as a distinct item, separated from surrounding text by at least one letter-height of blank space above and below, and by twice the width of the letter “N” on each side.⁵ It sits in the bottom 30 percent of the PDP, parallel to the base of the package. Packages with a PDP of 5 square inches or less are exempt from the bottom-30-percent rule, but every other requirement still applies.⁴

The declaration must be conspicuous and in boldface, with distinct contrast from the background, whether that contrast comes from color, typography, layout, embossing, or molding. Light gray on white fails. Buried inside a busy graphic fails. And qualifying words that exaggerate or obscure the amount are prohibited outright: no “jumbo quart,” “giant liter,” “full gallon,” or “minimum” alongside the figure.

What Goes on the Information Panel Instead

The PDP is not the only regulated space, and knowing what belongs elsewhere keeps the panel from getting overloaded. Under 21 CFR 101.2, the information panel is the label area immediately to the right of the PDP as the consumer faces the product. That is where the ingredient list, Nutrition Facts, and allergen declarations typically go. If the space to the immediate right is unusable, such as a folded flap or the end of a can, the next panel to the right takes over. When a round container’s top serves as the PDP, any adjacent panel qualifies.¹¹ Required declarations must stay grouped together on the same panel, without unrelated material squeezed in between.

Language Rules

All mandatory label information must appear in English. The narrow exception covers products distributed solely in Puerto Rico or a U.S. territory where another language predominates; there, the predominant language may replace English.¹²

Here is the trap: if any part of the label uses a foreign language, every mandatory declaration must also appear in that language. A Spanish tagline in the marketing copy triggers a requirement to duplicate the identity statement, net quantity, ingredient list, and everything else in Spanish. The only carve-out covers individual serving-size packages of 1.5 ounces or less served in restaurants and similar settings, and only when the foreign language is limited to the food’s name.¹²

Small Package and Multi-Unit Allowances

Small packages get some relief, though less than manufacturers often assume. Packages with a total surface area under 12 square inches are exempt from the standard Nutrition Facts panel, provided the label makes no nutrition claims; the label must still provide an address or phone number where consumers can request the nutrition information.¹³ Packages with 40 square inches or less of total label surface may use modified formats, including tabular or linear layouts, when the standard vertical column will not fit.

For multi-unit retail packages, such as a shrink-wrapped six-pack, the inner units may skip repeating the manufacturer’s name and address, ingredient list, and nutrition information as long as the outer package carries all required labeling, the inner units are not sold separately, and each inner unit bears the statement “This Unit Not Labeled For Retail Sale” in type at least 1/16 inch tall.

What Misbranding Costs

A product that fails these requirements is misbranded under 21 U.S.C. § 343, which reaches food that lacks an accurate quantity statement, fails to name the manufacturer, or fails to display required information prominently enough “to render it likely to be read and understood by the ordinary individual under customary conditions of purchase.”¹⁴

The FDA usually opens with a warning letter identifying the violations and requesting a response.¹⁵ If violations persist, 21 U.S.C. § 334 allows the agency to seize misbranded food in interstate commerce, and an FDA officer can administratively detain suspect food for up to 20 days, extendable to 30, while the agency decides whether to file a formal seizure action.¹⁶ Criminal penalties under 21 U.S.C. § 333 start at up to one year in prison and a $1,000 fine for a first offense. A second conviction, or any violation committed with intent to defraud or mislead, raises the ceiling to three years and $10,000.¹⁷

On the FTC side, civil penalties can reach $53,088 per violation against companies that continue unfair or deceptive practices after receiving a Notice of Penalty Offenses, and that figure is adjusted for inflation each January.¹⁸ The FTC must show that the company knew the conduct was deceptive and that the Commission had previously issued a written decision finding similar conduct unlawful.

1
eCFR. 21 CFR 101.1 – Principal Display Panel of Package Form Food
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eCFR. 16 CFR 500.2 – Terms Defined
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eCFR. 21 CFR 101.3 – Identity Labeling of Food in Packaged Form
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eCFR. 21 CFR 101.7 – Declaration of Net Quantity of Contents
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eCFR. 16 CFR Part 500 – Regulations Under Section 4 of the Fair Packaging and Labeling Act
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eCFR. 21 CFR 101.7 – Declaration of Net Quantity of Contents
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eCFR. 21 CFR 101.5 – Food; Name and Place of Business of Manufacturer, Packer, or Distributor
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eCFR. 16 CFR 500.5 – Name and Place of Business of Manufacturer, Packer or Distributor
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govinfo.gov. 16 CFR Part 500 – Regulations Under Section 4 of the Fair Packaging and Labeling Act
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eCFR. 16 CFR 500.21 – Type Size in Relationship to the Area of the Principal Display Panel
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eCFR. 21 CFR 101.2 – Information Panel of Package Form Food
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eCFR. 21 CFR 101.15 – Food; Prominence of Required Statements
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eCFR. 21 CFR 101.9 – Nutrition Labeling of Food
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Office of the Law Revision Counsel. 21 USC 343 – Misbranded Food
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U.S. Food and Drug Administration. About Warning and Close-Out Letters
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Office of the Law Revision Counsel. 21 USC 334 – Seizure
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Office of the Law Revision Counsel. 21 USC 333 – Penalties
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Federal Register. Adjustments to Civil Penalty Amounts