MiniDV
The "L" cassette is about 120×90×12 mm and can record up to 4.6 hours of video (6.9 hours in EP/LP). The better known MiniDV "S" cassettes are 65 x 48 x 12 mm and hold either 60 or 90 minutes of video (11 GB) depending on whether the video is recorded at Standard Play (SP) or Extended Play (sometimes called Long Play) (EP/LP). 80 minute tapes that use thinner tape are also available and can record 120 minutes of video in EP/LP mode. The tapes sell for as little as $3.00 USD each in quantity as of 2007.
60-minute MiniDV tape will hold approximately 13 gigabytes of data in this form of usage as the DV video format has a constant data rate of 3.6 Megabytes per second (3.6 MB/s×60 seconds×60 minutes = 12,960 MB per hour, divided by 1024 = 12.66 GB per hour).
Though originally intended for the consumer market as a high-quality replacement for VHS, L-size DV cassettes are largely nonexistent in the consumer market, and are generally used only in professional settings. Even in professional markets, most DV camcorders support only MiniDV, though many professional DV VTRs support both sizes of tape.