Several times over the last week I've heard a CD referred to as a stocking stuffer. Is that because it's small???

I always thought of stocking stuffers as small inexpensive gifts that are fun but in no way would be considered a "regular" gift. Do you know what I mean? I always try to find some things under $1 like a match box car, a little notebook, cool pencil, lip gloss, candy canes, gum,etc. and each child would get about 5 little things. I also have found new things at garage sales that I've paid $.10-.25 for.
Just wondering if I'm out of touch with the whole stocking stuffer custom...