Here's a thought:  Knowing that you might not wear that piece of clothing again, what if you didn't need to buy it at all?  Turns out you can Rent The Runway!  With this gift card you can:

Choose the perfect look from over 170 designers for your special occasion.  Select a date up to 4 months in advance, and rent for 4 to 8 days.  Stop wasting money on outfits you only wear once.  Instead, rent it.  Rent The Runway even sends you a second size for free.  They offer next day delivery, and their returns are free and simple: Just use the pre-paid envelope provided.  Rent the Runway takes care of the dry cleaning.

Check them out at: https://www.renttherunway.com/ourrunway