On Extreme Couponing last night one of the shoppers pointed out that in many instances it is cheaper to buy the smaller sizes of products rather than the larger. He was talking about a toothpaste purchase where the small size was only 2 ounces less than the large, but was over 50% less in cost.
Just a few years ago large sizes were usually less expensive per ounce, but manufacturers became aware that consumers were shopping for larger sizes to save money. So, in a bid to make more profit they began to charge more per ounce for their larger sizes, knowing that shoppers were conditioned to buy large.
Be sure to compare the per ounce cost when shopping. And please, don't emulate the man on Extreme Couponing and buy over a thousand tubes of toothpaste! Even if they're free!!