I've had it for about 6 months or so and I love it.
Just wrap a string around the thickest part of your wrist (where the watch would sit) and lay it out on a measuring tape.
I'd rather not ship the thing back and forth, when it's sold, I'd like it to remain that way, so make sure it's big or small enough for you.
To tell the time:
The red dots are the hours, there are 2 rows of 6.
Next at the bottom center are 3 Green LEDs, they are 15 minute intervals.
The orange are 1 minute intervals and there are 14 of them in 3 row increments.
If you look at the 1st pic you can read it says 9:37
No A.M. or P.M., but I'd hope you could figure that part out in most cases
BTW, Tokyoflash states:
"Shinshoku has a strap which is easily self-adjustable to fit your wrist and fits wrist sizes of up to 8.5 inches (225 mm)."