I have a Hall Los Angeles cobalt blue 8-cup teapot. Mostly I see 6-cup and, occasionally, 4-cup teapots but seldom 8-cup. Would the 8-cup be worth more than the other sizes?
Not usually !! The rarity depends on the style and who the designer was as well as the number in that production run ect !! There are a few that are more rare than others but have no idea which teapot you have !! Can you post a pic ??