The Korthals Griffon is a medium-sized robust dog that stands 50 to 60 centimetres at the withers and weighs 50 to 60 pounds. It is a handsome dog with a well-developed moustache and beard, giving off a determined and confident presence. It has a large yet not too broad head, long and square muzzle, brown nose that is always a bit convex at the tip, brown or dark yellow round eyes, bushy eyebrows, medium flat ears, and a strong jaw with a perfect scissor bite.
The Korthals Griffon boasts of a harsh and coarse outer coat and a dense undercoat. The accepted KC standard colours are steel grey with liver brown patches, solid liver brown, white and brown, liver brown with white hairs, and liver roan. The Korthals Griffon only requires weekly brushing, which only becomes more frequent twice a year, during spring and autumn when they shed more heavily. However, it needs to be hand stripped at the groomer’s twice a year for grooming to be easier at home. It can be bathed as needed, when it is visibly dirty or when it starts to have that doggy smell.
Other basic grooming needs are nail trimming once a month, tooth brushing twice a week and regular inspection and cleaning of its ears.