This is one of those things from the movies that is worth playing out in real life, even if it only happens once.
With your lover’s size in hand, head to the lingerie store or local boutique and select an outfit that you know your partner would love and that you find tantalizing.
Have the sales clerk package it up in an attractive way and then have this delivered to your lover’s office with a note that says something like “I’d love to see in you in this tonight.”
Just be as discreet as possible about it so it doesn’t attract the attention of nosy coworkers. You want your lover feeling inspired, not embarrassed.