Is this adequate?

[HmongVillager]

Is 5 dressing rooms and 3 mirrors adequate for a level 14 boutique?

[jojopeanut]

Yes as long as your customers have access to these and have the dressing rooms spread out amoung your racks. Wall mirrors are great they use those as long as nothing is in front of the mirror. IF you see the green bubble above their heads you may need to change things up. If everyone is happy and shopping then your fine.