Helium Digital 3.5mm Headphone Adapter

The shortest adapter in our roundup (see link, below), Helium's offering--pictured at the top of this article--is only 2 inches long (not counting the female adapter at the end) with a fairly flexible cable, but has the bulkiest female adapter of the bunch. The biggest advantage of this model is its super-low price; on the other hand, it ships from Canada, so some of the cost savings may be offset by shipping charges.

--Dan Frakes