Length of a master's thesis and its literature review?
I found 5 theses related to my master's thesis topic on the Open Access Theses and Dissertations website. All of them were 120 pgs - 150 pages, although this was for engineering. The literature review was (appx) 30% of each thesis. My suggestion is to check the OATD website, find theses in your field and closely related to your topic to get a pretty general idea of the length and breadth of literature review.