Bertha is a hefty, black woman with curly, dark brown hair stuck upwards with a hairband and gold earrings on her head. Her most common clothing includes a long-sleeved, blue shirt patterned with outlines of flowers which reveals cleavage, two light-blue, pearl necklaces, pink underwear, a light-blue skirt and dark blue shoes. Her arms and legs are very thick, though the latter are often noticeably skinner when she is wearing her skirt. Both are arms and her legs are skinner in "Farmyard", but her torso stays the same.