Generally, everyone wore a collar and tie, long trousers, and leather shoes, but I wore the same without the tie. I don't like them, they feel claustrophobic. One guy had the tie, but wore training shoes.
The boss once asked us if we'd like white lab coats if he got us some, but nobody was interested much, so he didn't bother.
You can get short of different length
but it is range dependant in places like Next or M&S
so if I go there and think "Oh - that's nice" then I can only have that design,colour etc in that length
there will be others that are shorter or longer - but not long medium and short as in trousers
This.
Once you've picked the type of shorts you want (I like khaki walking shorts), you don't get a choice, you just have to take whatever the current fashion is. I particularly like zip-off trousers that serve as longs and shorts, and whilst they come in S-M-L, the length of the shorts has been getting a larger percentage of the overall length.
Clothes sizes aren't even consistent, I've got two pairs of Craghoppers walking trousers that have identical waist sizes, but one's a 34" waist and the other's a 36". There's just no need for that sort of cr@p, any idiot can use a tape measure properly, it's not difficult.
Dark clothing in summer seems to be the fashion at the moment, I don't know which bright spark thought that was a good idea.