Pottery vessels vary in form, size, and use. They can be classified into groups such as dishes, plates, bowls, basins, pots, jars, vases and bottles.

Flat open form Solid cosed form	height/diameterunder 1/6		Dish/Plate	form  flat,shallow,open-mouth. use place, serve parts base, mouth
	height/diameterunder 1/3		Bowl	form  flat,shallow,open-mouth. use contain, serve parts base, body, mouth
	heigh/diameterabove 1/3		Basin	form  deeper than bowl,biggerdiameter,open-mouth. use contain, serve parts base, body, mouth
	neck diameterbody / body diameter above 2/3		Pot/Jar	form  big and deep body wide-mouth. use contain, store parts base, body, neck,mouth
	neck diameter/body diameter above 2/3		Vase	form round and swollen body, constricted-mouth use contain, store parts base, body, neck, mouth
	neck diameter/body diameter above 1/3		Bottle	form longer and narrower neck than a vase, small-mouth use  contain, store, pour parts base, body, neck, mouth