Irish Water Spaniels are medium to large-sized dogs, most weighing 45 to 65 pounds and standing around 21 to 24 inches tall. Males generally stand between 22 to 24 inches at the shoulder, while females are slightly smaller, typically standing between 21 to 23 inches. Males usually weigh between 55 to 65 pounds, and females generally weigh between 45 to 55 pounds.