Is this bit legal for dressage?

Check the exact bit against the USEF Dressage rule DR121 and its Annex A, not against a shop listing or a friend's say-so. A product title that says 'dressage legal' is a sales line, not a ruling. The rule says it plainly: only the bits pictured in Figures 121.1, 121.3 and 121.4 of the USEF Dressage rules, plus the bits listed in Annex A, are permitted. If a bit is in neither place, the rule doesn't allow it.

Annex A is the long supplement of photographs and checkmarks. It marks each bit as permitted or not for USEF national tests, for double bridles, and for FEI tests. Anything marked 'Pending Review' is not permitted in USEF or USDF competition until the Annex says otherwise. For FEI CDI events, USEF sends you to the FEI Dressage Rules and the FEI TackApp, which lists items by category with a status for each discipline.

One caution about this page: we explain the rule here, but we are not the rule. Our own lists of bits never replace the book. Open the current rule, find your model by name, and note the date on the Annex. When we last read it, Annex A said it was updated May 6, 2026.

Yes. USEF added a dedicated bits paragraph to DR121 for 2026, and it has been in force since April 15, 2026. The change was labeled a rule clarification. USEF's stated reason was that bits with 'slots' in the rings had never been pictured in the rulebook or Annex A, yet some otherwise legal models are sold with them. The new wording makes it clear that no bit with slots in the rings is permitted.

The same paragraph now says in one place what used to be spread around. Bits must be used in a conventional manner and attached only as the diagrams show. All bits must be smooth with a solid surface. Twisted bits, bits with 'bumps', bits with uncovered wire or cable, and bits that place mechanical restraint on the tongue are prohibited. Joints that could trap or pinch the oral tissues are not permitted.

A second change from the same date limits the forward tilt of a shaped curb mouthpiece to 45 degrees, to avoid a tongue-plate effect. USEF publishes its changes in dated summaries on its Dressage rules and equipment page, which also lists changes with later effective dates. Rules move, so check the page again before you buy or show.

For USEF dressage, the allowed family is the snaffle in its many cheek styles. The double bridle comes in at Third Level. The table sums up what DR121 says. Use it to understand the logic, then check your bit against the book itself.

Yes. DR121 limits the material, and it sets a minimum thickness that depends on the class. A snaffle mouthpiece must be metal, flexible rubber or synthetic material. A metal mouthpiece may have a rubber or plastic covering, as made by the manufacturer, but you can't modify a bit by adding latex or other material yourself. Leather and leather-covered bits are prohibited.

On thickness, the snaffle mouthpiece must measure at least 10 mm where it meets the rings or cheeks. Snaffles used in Young Horse and Children's classes must measure at least 12 mm. Ponies are an exception, and may be under 10 mm for riders of any age. For FEI CDIs, Annex A's notes give 12 mm for horses and 10 mm for ponies. A curb mouthpiece must be at least 12 mm.

Check the number on the bit's packaging or the maker's listing. It is a good reason not to buy a very thin mouthpiece without looking, because a bit that is legal in shape can still fail on diameter.

Some are and some aren't. Legality is decided model by model, not brand by brand. Annex A lists several Myler snaffles as permitted: the MB02 comfort snaffle, the MB32 mullen barrel, the 04 low port comfort, the 06 mullen barrel, the MB36 forward tilted barrel and the 33 WL wide low ported barrel. It lists the Myler 33 ported barrel snaffle as not permitted because its port exceeds the 30 mm height limit, and the two Myler Weymouth curbs it shows, low port and high port, as not permitted. The MB06 in a D-ring is not allowed as a bridoon, though the same mouthpiece with a loose ring or eggbutt is. Our Myler page carries the same list, with the levels explained.

For Happy Mouth, the Annex lists the plain mullen loose ring as permitted as a snaffle, and notes its flexible mouthpiece is now permitted at FEI levels. It lists the HB 6801 bridoon and the HB-6000 SP Weymouth as permitted in a double bridle. It marks the Happy Mouth shaped (wavy) mullen as not permitted in the USEF columns, noting that it isn't considered a true mullen.

We looked for dressage-legality statements on the manufacturers' own sites. We found no page we could verify, so the USEF Annex is the source here. It is also the one that counts. Match your bit's model number to the Annex line, and ask USEF if yours is a variation.

Not in a USEF dressage test that we can find. Check with USEF before you plan on it. DR121 says only the pictured and listed bits are permitted, and we found no hackamore or bitless bridle in the bit section of DR121 or in Annex A. Bitless is fine for schooling, hacking and plenty else. We just won't tell you the dressage ring accepts it when the rulebook is silent. If you want a ruling, email the USEF Dressage Department at dressage@usef.org. Annex A says that new items and variations need a ruling from that department, and photographs both on and off the horse are preferred.

Other disciplines differ. The USEF Eventing annex (version dated 12/1/2025) says hackamores are permitted in the cross-country and jumping phases, and doesn't list them in the dressage phase. The USEF Hunter rule HU105 lists snaffles, pelhams and full bridles with a cavesson noseband as required, so hackamores aren't on that list either. Always read the chapter for the division you're entering.

In the hunter ring the answer is a snaffle, a pelham or a full bridle, each with a cavesson noseband. That's rule HU105 in the 2026 USEF Hunter chapter. A judge may penalize, but may not eliminate, a horse in an unconventional snaffle, pelham or full bridle, and the rule gives hunter gags and kimberwickes as examples. A judge must eliminate a horse in an illegal bit, such as a three-ring bit or a gag other than the hunter gag. Illegal nosebands include drop, flash and figure-eight nosebands.

A curb used with any leverage bit must be made of loose links or joints, or lie smooth against the jaw, and be free of twists and sharp objects.

USEF's hunter seat equitation page says the bridles and bits permitted in Hunter Seat Equitation classes are the more traditional hunter-style tack, with traditional snaffle and pelham bits and a cavesson noseband. For Jumping Seat Equitation, it says additional jumper-type tack is permitted, such as gag bits and two- or three-ring bits. Other organizations and local shows can set their own rules, so read your prize list.

Size the bit to his mouth, then measure the bit itself before you buy. Horse & Hound suggests an inexpensive plastic bit sizer, and if he falls between two sizes, go up one. Without a sizer, mark each side of his mouth on a piece of string and measure the distance between the marks.

To check fit, stand in front of him with a little contact on the rein. As a very general guide, you want about an index finger's clearance. On a loose ring, the lips should clear the ring holes by about 1/8 inch on each side, and if half an inch or more shows, the bit is too big. Too narrow squeezes the lips and cheeks, and too wide can slide and bruise the mouth.

To measure a bit, lay it flat on a ruler. For loose-ring bits, measure from the inside of one ring hole to the inside of the other. Mouthpieces run from about 12 mm to 23 mm, and Horse & Hound calls 16 mm the most common. If he fusses with a legal bit that fits, ask your vet or equine dentist to check his mouth, rather than changing bits again.

Check the model name, the class and the date, in that order. The rule moved this year, and it will move again.

• Find the exact model name and number on the packaging or the maker's page.
• Look it up in the current Annex A, and read the notes on the page, especially any 'bridoon' or 'FEI' remarks.
• Check the class: national test, Young Horse, Children's, double bridle level, or an FEI test.
• Check the thickness against the minimum for that class.
• Look at the Annex A date on the first page, and look for newer rule-change summaries on USEF's site.
• If your bit is a variation, a new model or isn't listed, email USEF before you buy.