calves and ankles with greater circumference than normal, bearing similarity to baby elephant legs and young trees, hence jumbo + stems. Often covered by brown woollen socks to inadvertently accentuate mass of lower leg. See also cankles, but note jumbo stems have different ratio to knees and thighs. Sometimes refered to as Christian legs
From the silhouette I thought it was Jaja Binks, but then realized it was Greta with her jumbo stems.