Cob size is a measurement category used across equestrian equipment — particularly tack, rugs, and protective boots — to indicate sizing appropriate for a cob-type horse or pony. It sits between pony and full (or horse) size in most manufacturer ranges, and choosing the right size category is essential for both the horse’s comfort and the equipment’s effectiveness. Beyond tack sizing, the term “cob” also describes a distinct type of horse with specific physical characteristics that set it apart from both ponies and larger horse breeds.
What Is a Cob?
A cob is not a breed but a type — a classification based on build, bone, and disposition rather than bloodline. Cobs are characteristically stocky, short-backed horses with strong bone structure, good feet, and a willing temperament. They typically stand between 14.2 and 15.2 hands (hh) at the withers, though the height range can extend slightly either side.
Classic cob characteristics include:
- Short, broad back with well-sprung ribs
- Dense, flat bone — typically 9 inches or more of bone measurement below the knee
- Short, strong neck set onto good shoulders
- Well-muscled hindquarters
- Hardy hooves requiring minimal farriery intervention
- Calm, sensible temperament — often described as “bombproof”
Well-known cob breeds include the Welsh Cob (Section D), the Irish Cob (Gypsy Vanner), and the Clydesdale cross types commonly seen on British showing circuits. Coloured cobs — piebalds and skewbalds — are enormously popular in the UK and dominate the showing classes at county level.
Cob Size in Tack and Equipment
When you see “cob size” on a bridle, saddle pad, or set of brushing boots, it indicates the item has been sized to fit the proportions of a typical cob — primarily the shorter, broader head and thicker neck compared to a full-sized horse, and the stockier body requiring a shorter, wider saddle panel.
Key sizing differences between cob and full (horse) size:
- Bridles: Cob bridles have shorter headpieces and cheekpieces, and a wider browband to accommodate a broader forehead. The noseband sits differently on a cob’s shorter, wider nose.
- Saddles: A cob-sized saddle will typically be shorter in the seat length range and built with a wider tree to accommodate the characteristic flat, wide wither and broad back.
- Rugs: Cob rug sizes run from approximately 5’3″ to 6’0″ (chest to tail measurement), fitting the shorter body length of a typical cob compared to a 15.2hh Thoroughbred.
- Boots and bandages: Cob-size leg protection is wider in circumference and slightly shorter in height than full horse size, matching the denser bone and cannon bone proportions.
When Cob Size Doesn’t Fit
Not every horse between 14.2 and 15.2hh is a cob, and not every cob falls within this height range. A fine-boned 15hh Thoroughbred will wear full-horse-sized tack, while a heavily built 15.3hh native cross may fit cob sizing perfectly. Always measure before buying, particularly for saddles and bridles where an incorrect fit directly affects the horse’s performance and welfare.
Horse owners should also be aware that sizing conventions vary between manufacturers. What one brand calls “cob” another may label “large pony” or “small horse.” Checking the specific measurements given in a product’s size guide is always more reliable than relying on the label alone.
Frequently Asked Questions
What is the difference between a cob and a pony?
Height is the formal dividing line: ponies stand at or below 14.2hh; horses and cob-type animals stand above this. However, cob types and native pony breeds share many characteristics — stocky build, good bone, hardiness, and tractable temperament. The key practical distinction for tack sizing is that a cob generally has a larger head, thicker neck, and broader body than a similarly sized pony, requiring differently proportioned equipment.
Can I use cob-size tack on a horse that is slightly over 15.2hh?
It depends entirely on the individual horse’s build. A compact, well-muscled warmblood standing at 15.3hh may fit cob-sized rugs or boots if its proportions match. A bridle is the most critical item — always fit the headpiece and noseband to the specific measurements of the horse’s head rather than relying on height as the deciding factor.
What disciplines are cobs most suited to?
Cobs are notably versatile. In the UK they are particularly associated with showing, hacking, and as confidence-restoring horses for riders returning to the saddle after a break. Their calm temperament and strength make them excellent for less experienced riders and for equine assisted therapy programmes. Many cobs also compete successfully in affiliated dressage and showing classes at a good level.