Distinguishing Sukhothai style features
The Sukhothai style images of the Buddha distinguish themselves from other styles like Singhalese, Khmer or Mon by several characteristics: A gracious appearance, finely curled hair, broad shoulders, oval face, absence of hair lines, long ears, thin lips and a slight smile. Some have a flame shaped aureole around the head.
Most Sukhothai style sitting Buddha images are either in the meditation mudra or in the Bhumisparsha mudra, also known as “calling the Earth to witness” or “subduing Mara”.
Most Sukhothai style walking Buddha images show the Vitarka mudra (teaching and discussion) or Abhaya mudra (dispelling fear).