The London Lounge

I have 36 shirts, eighteen for the two warm seasons and eighteen for the cold ones. I send my shirts out. I find this to be adequate but "tight," with my wanting a few more shirts for each season. And this with a laundry just across the street. Anyone else find a "magic" number for an adequate shirt rotation. It appears to be a function of whether you send out your shirts and whether you wear them on the weekends.