Rival Crock Pot and Slow Cooker 5 Quart and 6 Quart Replacement Round Glass Lid for 3355 "glass replacement lid model" Questions

how big is the rival crock pot model #3351/1 and serial # 1227 http://www.manualslib.com/manual/261027/Rival-Crock-Pot-Stoneware-Slow-Cooker.html (for owners manual pdf file) ...