Book and card safety matches have their own USPS packaging instruction, and the short answer sits inside it: surface transportation only, a 25 lb cap per mailpiece, and specific address-side markings. Strike-anywhere matches do not get the same pass. We pulled the exact rule text from USPS Publication 52 on 2026-08-31 and ran a box of promotional matchbooks through our own quote engine the same day to see what a real checkout does with them.
The rule is not about fuel. Friction and heat are the hazard USPS is packaging against here, not a reservoir of gas or liquid.
Publication 52 groups matches under Hazard Class 4, Flammable Solids, alongside metallic sodium and nitrocellulose, and then carves safety matches out for a narrow surface-only allowance.
Read those three together and the shape of the rule is clear: the flammable-solids class as a whole is shut out of air transport and international mail entirely, and safety matches earn a single narrow exception for surface transportation inside the fifty states. Strike-anywhere matches get no such exception anywhere in the chapter.
A hazard-class table can only tell you permitted or prohibited. Packaging Instruction 4B in Appendix C is where the actual box-building rules live, and they go further than most sellers expect.
Note the small wording gap between the two USPS pages: section 344.3 lists the marking options as “Book Matches,” “Strike-on-Card Matches,” or “Card Matches,” while Packaging Instruction 4B itself, the more detailed source, lists “Book Matches,” “Card Matches,” or “Strike-on-Box Matches.” Either wording plainly identifies a safety-match shipment; when in doubt, match the phrasing on the packaging instruction, since that is the page the counter clerk is trained against.
Everything above collapses into one table once the match type is known.
| Item | Domestic mail | International mail | SMKlog checkout |
|---|---|---|---|
| Book safety matches | Surface transportation only, sealed receptacle, 25 lb cap, address-side marking | Prohibited | Quoted, no restriction flag |
| Card or strike-on-box safety matches | Same surface-only rule as book matches | Prohibited | Quoted, no restriction flag |
| Strike-anywhere matches (UN1331) | Nonmailable | Nonmailable | Not tested; USPS names it nonmailable outright |
| Other match types (UN2254, UN1945) | Nonmailable | Nonmailable | Not tested; USPS names it nonmailable outright |
| Matches over 25 lb in one mailpiece | Exceeds the Packaging Instruction 4B weight cap | Prohibited | Split into multiple mailpieces, each still marked and sealed |
The last row matters for anyone shipping a case rather than a handful of matchbooks: the 25 lb figure is per mailpiece, not per shipment, so a bulk order goes out as several correctly marked boxes rather than one oversized one.
We typed a box of promotional book matches into the live quote engine on 2026-08-31, from Berkeley Heights, NJ to Atlanta, GA. Because our restricted-items screening carries no keyword rule for matches the way it does for fuelled lighters or self-defense sprays, the request priced normally across all three carrier networks instead of returning a refusal.
| Carrier | Service | Price | Transit window returned |
|---|---|---|---|
| USPS | Ground Advantage | $9.48 | 3-4 business days |
| UPS | Ground Saver | $11.70 | Not returned for this row |
| FedEx | Ground Economy | $13.18 | 3-4 business days |
| UPS | Ground | $13.23 | 2-3 business days |
| UPS | 3 Day Select | $19.34 | 2-3 business days |
A price coming back is not the same thing as the shipment being correctly built. Whichever service actually carries the box, the sender is still the one on the hook for the sealed receptacle, the 25 lb cap, and the address-side marking above if USPS is the carrier fulfilling delivery — our checkout returning a rate does not check any of that on its own.
Nothing about a matchbook is pressurized or holding liquid fuel, which is why the rule reads differently from lighters or aerosols. The concern is a strike surface rubbing against something else inside the box and setting off the whole receptacle.
25 lb is a per-mailpiece figure. A bulk restock of matchbooks for a bar or restaurant goes out as several sealed, marked boxes rather than one large one over the cap.
Publication 52 is a USPS mail rule. If the cheapest quote above ends up moving through UPS or FedEx rather than the Postal Service, that carrier's own dangerous-goods program is what applies, and we have not read either carrier's own published match-specific terms here.
USPS revises Publication 52 without notice. Treat the figures above as what the two pages stated on 2026-08-31, and check the current text before packing a shipment.
Book, card, and strike-on-box safety matches are permitted, but only in domestic mail via surface transportation. USPS Publication 52 section 344.21 states it plainly: book, card, or strike-on-box safety matches are permitted only in domestic mail via surface transportation. International mail and domestic air are both closed to them.
No. Publication 52 section 344.4 names strike-anywhere matches as an example of a nonmailable flammable solid, and Packaging Instruction 4B adds the UN numbers directly: matches assigned UN1331, UN2254, or UN1945 are nonmailable. Only the UN1944 safety-match type qualifies for the surface exception.
Packaging Instruction 4B calls for the matches tightly packed in a sealed primary receptacle so nothing shifts or rubs, a strong outer box that holds the receptacle and cushioning snugly, and a total mailpiece weight no greater than 25 pounds. The address side needs "Surface Only" or "Surface Mail Only" plus "Book Matches," "Card Matches," or "Strike-on-Box Matches," as applicable. No shipping paper is required.
Yes. We ran a box of promotional book matches through the live quote engine on 2026-08-31 and it returned five ordinary rates rather than a block, because our restricted-items screening does not carry a keyword rule for matches the way it does for fuelled lighters or self-defense sprays. That is a checkout fact, not a substitute for the USPS surface-only requirement, the 25 lb cap, or the address-side marking above — those still apply to whichever carrier and service actually moves the box.
It does not change the hazard class. Publication 52 section 344.1 lists matches among its own examples of Division 4.1 flammable solids regardless of quantity, because the hazard is friction and retained heat rather than a fuel reservoir. A single matchbook and a case of them sit in the same rule; only the 25 lb per-mailpiece cap in Packaging Instruction 4B changes with quantity.