The Standard Manchester Terrier is a medium-sized dog, weighing between 12-22 pounds (5.4-10 kg). The Toy Manchester Terrier, as the name suggests, is a smaller version of the breed, weighing up to 12 pounds (5.4kg). In addition to the size difference, Standard Manchesters may have naturally erect, cropped, or button ears, while the Toy can only have erect ears.