"a total length of" is correct and can be used in written English.
For example, "The hallway has a total length of 22 feet".
We identified 388 extended inaccessible regions of a total length of over 22 Mb.
The striplines have a total length of ~48 mm and are separated by 10 µm.
This resulted in 1,496 contigs with a total length of ∼137 Mb.
The assembled transcriptome contains 81597 contigs, with a total length of 91,851,747 bp.
The Khābūr ("Source of Fertility") has a total length of about 200 miles (320 km).
Conversely, we also identified 1957 hyper-accessible regions of a total length of 350 kb (see Methods).
River Witham, main river of Lincolnshire, England, with a total length of about 80 miles (130 km).
It then continues generally southeastward for a total length of 130 miles (210 km) to the Delaware River at Philadelphia.
The geekcorps.org mailserver tells Hotmail that there are two messages in the spool with a total length of 320 octets.
The FEL has a tabletop size with a total length of 2.5 m.
The bridge, realized using the incremental launching method, has a total length of 574 m.
