Journals with highest impact factors
http://www.spinellis.gr/blog/20140808/

Computer Science journal rankings
http://www.scimagojr.com/journalrank.php?area=1700

Foundations and Trends in Human-Computer Interaction
Desney Tan's study was about 29 pages long.
http://www.nowpublishers.com/HCI

International Journal of Human-Computer Interaction Studies
http://www.elsevier.com/journals/international-journal-of-human-computer-studies/1071-5819?generatepdf=true
1.165 (impact factor)

IEEE Computer Graphics and Applications
impact factor 1.116
Don't exceed 8,000 words

IEEE Computer
4500-6000 words
1.473

Page requirements:
http://www.computer.org/web/peer-review/magazines#Length

Human Factors and Ergonomics Society
http://www.hfes.org/Publications/ProductDetail.aspx?ProductId=1

Rankings:
2013 Impact Factor: 1.290; 5-year Impact Factor: 1.964. Human Factors ranks 5th of 16 journals in the Ergonomics category, 32nd of 75 titles in Applied Psychology. Human Factors maintains a cited half-life of more than 10 years.

Objective Background Method Results Conclusion Application—why is this practical?

• Limited to 4500 words
• APA format

Overall:

Some articles are 4-8 pages Others Span 20-30 pages. Overall, the range seems to fall between 3,000 and 8000 words