Portfolio guidelines - for Illustrators and Cartoonists
From the book, Artist's & Graphic Designer's Market '99

Illustrators have several choices when submitting to markets. Many freelancers send a cover letter and one or two samples in initial mailings. Others prefer a simple postcard showing their illustrations. Here are a few of your options:

If you send 8 x 12 photocopies or tearsheets, do not fold them in thirds. It is more professional to send them flat, not folded, in a 9 X 12 envelope, along with a typed query letter, preferably on your own professional stationery.

Humorous illustrators and cartoonists should follow the same guidelines as illustrators when submitting to publishers, greeting card companies, ad agencies and design firms. Professional looking photocopies work well when submitting multiple cartoons to magazines.