Two systems ran in parallel for years. Only one of them is still authorized, and it is a diamond rather than a rectangle.
Where the old marking went
The retirement was written into the rule itself rather than announced and forgotten, which makes it easy to check.
Pull the same section from the current edition and the entire text is gone, replaced by a single bracketed word: Reserved. The definition it pointed at, 49 CFR 173.144, no longer resolves either. A marking that appears in no current section of the hazardous materials regulations is not a marking any carrier can accept as compliance.
The marks that are current
Two versions of the limited quantity mark exist, and the difference between them is a single letter that decides whether a package may fly.
| Marking | Shape and colors | Where the rule lives | Status |
|---|---|---|---|
| Limited quantity mark | Square-on-point, top and bottom portions black, center white or a contrasting background | 49 CFR 172.315(a) | Current, for modes other than air |
| Limited quantity Y mark | The same square-on-point with a letter Y in the center | 49 CFR 172.315(b) | Current, for packages meeting the air quantity limits in 173.27(f) |
| ORM-D designation | Text inside a rectangle roughly 0.25 in larger on each side than the lettering | Formerly 49 CFR 172.316 | Retired; the section now reads Reserved |
The same paragraph asks for the mark to be durable, legible, sized in proportion to the package, readily visible, and applied on at least one side or one end of the outer packaging. A package carrying it is excused from the ordinary shipping-name and identification-number marking rules unless the contents are also a hazardous substance or hazardous waste.
What this means for a small shipper
Almost nobody reading this needs to draw the mark themselves. What matters is knowing which lane a consumer item is on, and what the box has to say.
- Retail-sized flammable and aerosol goods that ship at all ship as limited quantity, on the ground, with the square-on-point on the outer box.
- The postal version bars those materials from Priority Mail Express and Priority Mail, so ground products are the only postal home for them.
- Lithium batteries do not use this mark. They carry their own lithium battery mark with a UN number, covered on our battery label guide and the UN3480 reference.
- Preprinted limited quantity labels cost a few cents each and remove the sizing question entirely. Hand-drawn approximations do not meet a specification written in millimeters.
| Carrier | Service | Price | Transit window returned |
|---|---|---|---|
| USPS | Ground Advantage | $8.48 | 8-9 business days |
| UPS | Ground Saver | $13.12 | Not returned for this row |
| FedEx | Ground Economy | $13.18 | 6-7 business days |
| UPS | Ground | $13.38 | 2-3 business days |
| UPS | 2nd Day Air | $21.96 | 2-3 business days |
Only the ground rows apply once a regulated item is declared. Our checkout removes the air options for you rather than leaving the decision to a checkbox nobody reads.
Why the change happened at all
ORM-D was a United States designation that never matched the international limited quantity system, which made harmonized shipping awkward for anyone crossing a border. Folding it into the square-on-point aligned domestic ground rules with the way the rest of the world already marked small hazardous consignments.
The Y is the air version
A package may display the limited quantity Y mark only when it conforms to the authorized substance and article provisions and the inner and outer quantity limits in 49 CFR 173.27(f). Without those limits met, the plain mark and a ground service are the honest combination.
Old stock is not a defense
Boxes and labels printed before the change still exist in warehouses. A carrier reading ORM-D on a carton today is reading a designation with no current rule behind it, which is the sort of detail that turns into a refused shipment at acceptance.
Limited quantity marking questions
Is the ORM-D label still valid?
No. The 2020 text of 49 CFR 172.316 authorized the designation only until December 31, 2020, and the section in the current Code of Federal Regulations reads Reserved.
What mark replaced ORM-D?
The limited quantity mark: a square-on-point with black top and bottom portions and a white or contrasting center, described in 49 CFR 172.315(a) for transport by modes other than air.
How big does the limited quantity mark have to be?
At least 100 mm on each side, measured from the outside of the border lines, with a border at least 2 mm wide. Small packages may use a reduced mark no smaller than 50 mm a side with a 1 mm border.
Does USPS still use the term ORM-D?
Only to explain the change. Publication 52 section 336 describes limited quantity surface materials as including materials previously classified as Other Regulated Materials for Domestic, and prohibits them in Priority Mail Express and Priority Mail.