My "standard" cookie gift box is filled with 25 traditional (not decorated) cookies and topped with a hand-stamped note card. The cookies are about 2" across. You'll be able to choose 5 flavors. $20 + sales tax & shipping (if necessary).
As you can see by the pictures below, I can fill a box with fancy decorated cookies too. In the case of a custom filled box, the price will depend on what goes inside. Just let me know what you are thinking of.