These are made from the blouse tops of this dress pattern. When I first saw this pattern I thought this would make a great stand alone top. They were super simple to whip up, with each taking about 4 hours.
Here you can see the altered pattern for the original dress top (in blue) and the longer 'blousier' blouse top (in red).
Ive done different variations of this, some with pleats some with just gathers. I did have to lengthen the facing and the front and back, so I could tuck it in my skirt or pants. The fit over the hips is great.
I wanted to keep these as staples and not really show pieces in my wardrobe, so I kept the buttons simple and classic.