The expression "had a length of" is correct and usable in written English.
You can use it to describe something that has a certain size or extent. For example, "The python had a length of 5 feet."
One of many royal Egyptian cubits had a length of 20 64/100 inches.
Each segment had a length of 3 s.
The longest trending topic we observed had a length of 14.7 days.
The final measurement stage had a length of friction L = 3,000 m.
The tube had a length of 12.5 mm, an outer diameter of 240 μm and inner diameter of 100 μm.
The Si AFM tip had a length of ~125 μm with a radius of less than 10 nm.
The three beams, which had a length of 2 meters, were prepared using a 33-MPa-compressive-strength concrete material.
Each basin had a length of 50 cm, width of 30 cm and depth of 8 cm.
The majority (73.7%) of patients admitted had a length of stay in hospital greater than 24 h.
Without using undisturbed bits, the longest improbable differential attack we could find for Present had a length of 7-rounds.
Each time series had a length of 900 s and a number of data points between 220 and 300 k.
