How much clothing should be ready in the wardrobe
Short answer: Enough to cover the period between two washes plus three to five days of reserve. Anything beyond that is storage, not wardrobe.
The calculation for each category
Take the days between two washes and add three to five. Washing weekly, that means twelve of what you wear daily and five to six of what you wear a couple of times a week.
Why the reserve is necessary
The reserve covers a week when you do not get to the laundry, a trip and a few garments that are drying. Without a reserve you end up washing twice a week. See bamboo underwear for men.
What should not be in the wardrobe
Seasonal clothing you are not wearing now, clothing in another size and clothing you have not worn for two years. That belongs in a box or moved on. See bamboo clothing for women and bamboo clothing for men.
Frequently asked questions
How do I know if I have too much
If you never reach the bottom of a stack, there is more there than you wear.
Should you keep extras for guests
Only bedding and towels. Guests rarely borrow the rest.
Is having a lot bad
Not in itself, but what you do not wear does not wear out, it simply gets old.