These are some requirements you should meet when requesting for a signature.
Stock/Render: (Link to your picture)
Color: (Optional, not required)
Type: (Signature, avatar, banner, etc...)
Main Text: (Could be anything but keep it short)
Sub Text: (Under the main text)
Preferred Designer: (Who you prefer to make it)
Size: (Size of the signature in pixels)
Style/Theme: (Optional, not required)