The phrase "comparable size" means two or more things that are similar in their dimensions or proportions.
Sentences with «comparable size»
That's a steal compared to most other cities of comparable size. (effectivecoverage.com)
In contrast, districts of comparable size have as many as 1,500 administrators on the payroll. (gse.harvard.edu)
Multiply that by every city of comparable size in the USA, then add the smaller towns and you've got to be deep into in the thousands! (religion.blogs.cnn.com)