If you guessed a bra, you're right!
Several months ago, I'd seen advertised a Craftsy class on bra-making, and it was half-price. If you're not familiar with Craftsy, they have tons of video classes, kits, supplies and instructions for making just about anything. I'd never tried a class from there before, but this one interested me, so I bought it.
I watched the whole video series (streamed on my iPad), and sometime along the way I ordered the kit pictured above from Sweet Cups Bra Supply.
Then I procrastinated. I guess it was mainly because I was afraid it wouldn't fit right. The class instructor (self-proclaimed "Fairy Bra Mother"), who does a beautiful job, says from the get-go that the first one is a practice one, mainly for learning. In my opinion, it's kind of a spendy learning experience, but I guess it's the only way to get it right.
I finally got brave a couple weeks ago and got started. I was rather disappointed in the response (or rather, lack thereof) to questions I asked the teacher regarding size, so I went ahead and made it the way I figured would work best. It was quite easy to sew, although there were a lot of steps. Each step was demonstrated in the video, so it took any guesswork out of it. I had no problems with the sewing. Here is my completed bra.