Midbass = 6.5"
Mid range = 4"
Tweeter = 1.5"
Yes they will easily fit in Civic Exi ,Infact they were unplugged from Exi as well
Midbass will fit in door stock space using spacer,Tweeter will be fix on your dashboards or on A-pillars,For mid range you can make seperate fiberglass or some other material pods and stick on on dash,kick or in door by cutting door panel !
Or you can even use them without mid range (2-way),No worries !