Miniature Horse (including Mini Shetlands)
- Height: 9 – 11 hands
- Harness Size: Mini or Micro (very small sizes for miniature ponies)
Shetland Pony
- Height: 10 – 12.2 hands
- Harness Size: Pony size (fits small ponies)
Cob
- Height: 13.2 – 15.2 hands
- Harness Size: Cob size (between pony and full sizes)
Full Size
- Height: 15.2 hands and above
- Harness Size: Full size