The Welshie is a medium-sized canine that has an average height of 43–48 cm and an average weight ranging from 16 to 20 kg. Its body is a bit longer than its height and is compact and strong. It has a finer head than its English cousin and is built for hard work out in the field.
Its muzzle is somewhat long, straight, and square, with noses ranging from flesh to dark colour. Its ears are on the smaller side, tapers to the tip, and folds down to rest near its cheeks. It has hazel or dark eyes and long, muscular necks.
The Welsh springer spaniel has strong hindquarters and muscular second thighs. Its powerful hind legs complete the well-developed rear trio of muscle groups. The front ones are straight, medium-length, and well-boned. These end in round-shaped feet with thick pads underneath. The tail is rather feathered.
Its coat is silky, straight, and thick, with feathering in the front and back legs as well as the ears and tail. All Welshies, as a standard, must have a red and white coat. Do Welsh springer spaniels shed a lot? This breed sheds seasonally and only needs occasional grooming. A weekly brushing can be sufficient to keep its coat tangle-free.