Short Feather Headers Kit - 12-pin and 16-pin Female Header Set
These headers are particularly cute and tiny with a body height of just 5.0 mm they are the best way to minimize the amount of space your Feather project takes up, but still maintain that flexible configuration.
The kit comes with one 12-pin and one 16-pin female header. You can match these up with equally short male headers or you can use the male headers that come with your Feathers.
More information is available on the website of Adafruit.