With every design request you should include the following details: 

Size
Style
Orientation
Colors
Inspiration
Text copy

Print Designs require a few additional details: 

Bleed size (you can confirm this with your printer)
File formats (you can confirm this with your printer)

Kimp Tip: Want fewer revisions? Be as descriptive as possible, triple check your text copy, and provide pictures as references of the style you’d like.