Editing Cassette tape (section)

=== Tape length ===
[[File:Maxell compact cassette boxes, 60 and 90 minutes.jpg|thumb|Maxell compact cassettes, C60 (90&nbsp;m) and C90 (135&nbsp;m)]]
Tape length usually is measured in minutes of total playing time. Many of the varieties of blank tape were C60 (30 minutes per side), C90 (45 minutes per side) and C120 (60 minutes per side).<ref name="Common" /> Maxell makes 150-minute cassettes (UR-150) - 75 minutes per side. The C46 and C60 lengths typically are {{convert|15|to|16|μm|mil|abbr=off|sp=us}} thick, but C90s are {{convert|10|to|11|μm|mil|abbr=on|sp=us}}<ref>{{Cite web|url=http://en.wikiaudio.org/Audio_tape_length_and_thickness|title=Audio tape length and thickness|website=en.wikiaudio.org|language=en|access-date=16 March 2018|archive-url=https://web.archive.org/web/20180317035749/http://en.wikiaudio.org/Audio_tape_length_and_thickness|archive-date=17 March 2018|url-status=dead}}</ref> and (the less common) C120s are just {{convert|6|μm|mil|abbr=on|sp=us}} thick,<ref>{{Cite web|url=http://nactape.com/anablog/glossary|title=NAC Audio Cassette Glossary – Cassetro|website=nactape.com|language=en-US|access-date=16 March 2018|archive-url=https://web.archive.org/web/20180316214327/http://nactape.com/anablog/glossary|archive-date=16 March 2018|url-status=dead}}</ref> rendering them more susceptible to stretching or breakage. Even C180 tapes were available at one point.<ref>{{cite web|title=VintageCassettes.com|url=http://www.vintagecassettes.com/|access-date=26 September 2011|archive-date=6 August 2011|archive-url=https://web.archive.org/web/20110806194751/http://vintagecassettes.com/|url-status=live}}</ref>

Other lengths are (or were) also available from some vendors, including C10, C12 and C15 (useful for saving data from early [[home computer]]s and in telephone [[answering machine]]s), C30, C40, C50, C54, C64, C70, C74, C80, C84, C94, C100, C105, C110, and C150. As late as 2010, [[Thomann (retailer)|Thomann]] still offered C10, C20, C30 and C40 IEC Type II tape cassettes for use with 4- and 8-track [[portastudio]]s.<ref>{{cite web |title=Compact Cassettes |publisher=Thomann U.K. International Cyperstore |url=http://www.thomann.de/gb/compact_cassettes.html |url-status=dead |archive-url=https://web.archive.org/web/20100811024556/http://www.thomann.de/gb/compact_cassettes.html |archive-date=11 August 2010 |access-date=22 October 2010 }}</ref>