both of our daughters found this cap to be to small
9 & 13 with chin length and shoulder length hair

Too small to fit on an adult head with any hair.  Okay for small adults or children or really short hair.

It's great for anyone without the volume of Rapunzel's locks, as you eliminate the baggy effect to look, and feel, much neater.  More color choices would be great.

Used for lap swimming. Covers my bald head, but not my ears (which  is OK). Stays in place, but is not too tight, nor does it leave a mark on my forehead. Dries quickly. It serves its purpose very well, but probably would not work for my wife because she likes to put her hair up inside her cap. It's very good for a guy without a lot of hair, may not be so great for someone with lots of hair.

Wanted a cap for swimming in the local indoor pool that didn't hurt or pull my hair.  This one works perfectly.

Lycra caps are great.  They protect  my girls hair from tearing from the silicone caps.