What size office fits one person comfortably with storage: My first client taught me everything

https://www.commercialguru.com.sg/listing/for-rent-raffles-quay-offices-various-sizes-available-500023865

When a "Ready to move in immediately" sign changed how I size single-occupant offices The listing said "Ready to move in immediately." I drove over expecting a modest, efficient box with a desk and a chair