How to Measure Your Bit Correctly

There are various measurements to consider when sourcing and assessing the correct size of bit including length, thickness, ring size and design.

Loose Ring Cheeks

The picture below demonstrates a popular loose ring snaffle bit, the NS Team Up. Other cheeks that are measured this way include the Universal, Beval, Balding Gag and the measurements to consider are here:

How to measure Loose_Ring 400-132

1) Mouthpiece Length: The measurement is taken by placing the bit on a flat surface and pulling the rings apart so the bit is at its maximum length.  The Measurement is taken along the full length of the mouthpiece from the inside edge of the loose ring to the inside edge of the opposite loose ring and can be measured in inches or centimetres.

2) Mouthpiece thickness: This measurement is taken at the widest part near to the cheek just before the hole that the ring slides through.  Again, if you put the bit on a flat surface , you can slide a tape measure below this point and, if you look from above, you can see the thickness.  The most accurate way to measure the thickness of your bit is using an set of callipers, which are widely available.

3) Loose Ring Diameter: This measurement is taken from inner edge of the loose ring and is generaly measured in millimetres; 70mm being the average for the standard loose ring bit; 55mm is the typical bridoon ring size.

Fixed Cheeks

Fixed cheek bits include the Baucher or Hanging Cheek, Full Cheek, D Ring, Eggbutt, Cheltenham Gag, and Nelson Gag.  The picture below, showing the NS Tranz Full Cheek bit,  is a good example of the points to measure at for this type of horse bit.  As you can see, the only difference is that the mouthpiece thickness of the Fixed Cheek bit is measured directly adjasent to the cheek.

How to measure Fixed_Cheek 400-238


When sourcing a Weymouth for your horse, there are a couple of addtional measurements to consider as demonstrated in the picture.

How to measure Weymouth 400-320
  1. Shank length (lower): This measurement is taken from below the mouthpiece to the bottom of the shank (not the bottom of the loose ring) and is generally done in centimtres; 5cm, 7cm and 9cm are the options available within the Neue Schule collection.
  2. Shank length (upper): In the Neue Schule collection this measurement has been scaled according to the lower shank length of the Weymouth.  The Neue Schule website has further information on the legalities of various diameters and designs.  Visit Neue Schule’s You Tube channel to see Heather Hyde, Company founder and designer, explain in detail how to measure your bit.

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