Jack suggested, "Why don't you start with the most common type of badminton racket, the one used in professional tournaments? You can always create variations later."
: The hitting surface should not exceed 280 mm in length and 220 mm in width.
: Primarily used if the racket block is intended for 3D printing. Where to Find Racket CAD Blocks
Badminton racket: Everything you need to know - Olympics.com
Badminton racket: Everything you need to know - Olympics.com
Necessary if you intend to 3D print a miniature model of the racket. Where to Find Quality Blocks