The main differences between Welsh Section A and Section B ponies are their size, build, and movement. Welsh Section A, also called the Welsh Mountain Pony, is smaller, with a maximum height of 12 hands (48 inches, 122 cm) in the UK, and has a stockier build, shorter neck, and lower withers. They are hardy ponies known for their strong pony character. Welsh Section B ponies are larger, up to 13.2 hands (54 inches, 137 cm) in the UK, with a more refined, lighter build, longer neck, sloped shoulder, and pronounced withers. They have a more elegant and expressive movement, making them suitable as riding ponies, often used for children and in hunter-jumper disciplines. Section B ponies have thoroughbred and Arabian blood influence to enhance their athleticism, while Section A ponies retain their traditional hardiness and pony traits.