I use these to keep my head warm while I teach swim lessons, and while I swim.  They fit great.  Had many colors to choose from.

It works and its 3 bucks. I wish i bought more to justify shipping costs. One thing that annoys me is its too short to come over my ears and too long to cover just  hair, but thats probably just me.

Colors and quality are nice-but fit is large.
Kids complained the cap was too big for them.  If you have teens, cap may be too big.

I swim about 50 laps a day, and this cap generally stays dry for the first four, and then the water starts creeping in the side. Still, my head doesn't get overall soaking unless I backstroke. The cap is bigger (longer) than most of the latex caps, so it does continue to cover the ears even when it rides up a bit. I notice that particularly because I have long earlobes and most standard caps squish my earlobes. This one doesn't. For an even better seal and fit, I recommend the Aqua Sphere Aqua Glide Swim cap, which is ugly but many days keeps my head 99% dry.

These are great; they don't pull hair out.

The colors are vivid. Seems like it will last, not uncomfortable at all.