This Swatch is such a beautiful and unusual periwinkle, purplish blue.  It is rather large and very attractive; also it is extremely easy to see even in the dark because it glows.  I found no problem with the strap, even though I have very small wrists.  It fits me perfectly.

Coming back to edit:  I hope I haven't misled anyone re the color:  it is purple rather than blue actually.  The picture makes it look bluer than it is.  I still love it.