Hi CL:
I have the exact colors - 5970G, 3970R and 5050J. The 5050J has Roman numerals. As far as wrist time, I wear all about the same amount, although none are worn as "every day" type watches. I don't know what my wrist size is, but, in general I wear regular size straps on the last or next to last hole. On a large watch, like the 5970 I wear a short strap (of the type intended to be worn with a tang buckle) and I believe I wear that on the next to last hole. Hope this helps.
Best,
David