Cover letters typically follow a similar style and format:
Length
Write no more than one page
Number of paragraphs
include 3-4 paragraphs
Spacing
Use single-spacing, with a space between paragraphs
Margins
Align your content with the left-hand margin
Font
Use a well-known font like Times New Roman, Arial or Helvetica
Size of font
Use a font of 10-14 points; do not condense spacing between letters
Heading
Begin with the date, the name of the contact person, and the person’s title, organization, address, and phone number (and possibly email address)
Closing
End with your name, address, phone number, and email address
Signature
Sign your cover letter by hand