I stand 5ft and 3 inches, I decided to get the 30cm already because the 35 was too big for me and 25 is too small for what things I usually carry.I think size is more of a decision than colour to be able to use it in the evening. I wouldn't use my 35 as an evening bag but think the 25 is perfect however could be a little small for day use
I agree with all about bags! From your list of colors, I would choose etoupe swift 30cm with PH. Good luck!Etoupe would be a great neutral and it is different from black. Also depends on the leather, a grained leather will look too casual for evening. For a day to night look with a 30cm, I'd probably go for swift or box.