We suggest sticking to a font size of 10-11 for your resume.
Today, most job applications are viewed online instead of printed out and read because recruiters and employers will likely receive hundreds of applications; this also can be in the interests of environmental sustainability and cost reduction.
This recommended font size is because you can fit more on your resume with fewer pages, and it is an easy-to-read format. Viewing documents on a computer will also allow the employer to enlarge the text, depending on their preference.