i have used both sizes if you use small ones you have to us
e more .but the recipe is for .about 2- 6 or 7 inch cucs
and you can keep them until next dec , but you have to keep them in frig' i dont know why, 2 6-or 7 inch , makes a jar, i dont know exacialy what size jar ,i just keep all my jars pickel jars mayo jare and thats what i use