How Much Do Collie Dogs Grow?
How Much Do Collie Dogs Grow? Male Border Collies puppies will likely weigh between 20 and 25 pounds, while female will be between 18 and 22 pounds. A full-grown Border Collie stands 18 to 22 inches tall, with male Border Collies being slightly taller than their female counterparts. What age is a collie fully grown?