Perfect-sized rubber bands not always found in good quality. Use them mostly in the kitchen - excellent for securing opened chips frozen packages partly used even cereal (half or more gone) in the liner bag... Fold up the packaging and wrap 1 or 2 rubber bands around it.
I use these rubber bands when transporting large rolls of architectural drawings - they can handle just about any size set of drawings. And when I take the rubber band off the drawings I slip the rubber band on my wrist so I don't loose it since it's the perfect size for a wristband!