About half the foot of a cup.
Scratched on the bottom:
Edge and resting surface reserved. Polygonal House, west room, layer 2. Late 4th.-early 3rd. c. 1236 Leica PD 1133-20(F 125) ... 25 April 1957
Rectangular tone-lined pit (cesspool?) in street just south of the door of the Southeast Unit ... Southwest House in notebooks. (SD) southwest 1253 Horizontal (normal) ... 26 Apr 1957