1.References for length of caps' brim
2.References for different closure styles(cap back)
3.Design for different baseball caps(cap front)
4.Style selection(cap)
5.Bill selection (Cap)
6.Closure selection(Cap)
7.Logo print position selection(Cap)
8.Option of Caps-Brims

references for length of caps' brim：

references for different closure styles(cap back):

design for different baseball caps (Cap front):

Style Selection(Cap):

Bill Selection(Cap):

Closure Selection(Cap):

Logo Print Position Selection(Cap):

Option of Caps-Brims：