I like have a few different sizes, but the mini ones come especially in handy when you're trying to scoop out the remaining almond butter from the bottom of the jar! (simplyquinoa.com)
Buy supportive bras in a few different sizes to manage your breast growth during pregnancy. (kidshealth.org)
Choose a few different sizes — like newborn, 3 to 6 months, and 6 to 9 months — and keep in mind what the weather will be like when your baby is that age. (babycenter.com)