i went with my whole wardrobe for uniqlo.

shirts
- 10 x white
- 1 x each colour (green, blue, pink, gray)
- i suggest 2-3 more darker colours for days you plan on having anything for lunch with some curry soup/gravy as spills and drops are more easily covered up.
- i prefer buttoned down collars as it makes it looks smarter without the need to iron the shirts too much

pants
- 2 x black
- 2 x blue
- 2 x khaki (different shade each one)
- 2 x gray
- its great to mix it up and i normally wear my pants, if no spills and what not, make it last 1 pair for 3 days.

socks
-uniqlo on sale
- whatever colour buy 10 which is rm10 each and use that for 6 months before buying a new pairs of 5-10.
-sometiems just wonder in and buy if they have on sale.
- different colour socks looks quirky with whatever youre wearing, especially if its brightly coloured.

belt
- try to go with an interchangeable one between brown and black.

shoes
-just any black comfortable ones will do.

just a side note,
- my office doesnt practice it but if yours do, a comfortable pair pf sneakers and some short sleeve shirts for casual fridays.
- and a knitted sweater with buttons like the link below just in case you're cold. i'm aginst the pull overs because it messes up the outfit and hair

https://www.giordano.com/MY/en-US/Product/01057707002/70