This article summarizes ten essential factors brands must evaluate during custom metal tin box & metal case customization, covering size shape planning, raw material selection, brand printing design, printing craft, surface finish, internal foam compartment customization, functional closure structure, quantity budget, export shipping protection and pre-delivery quality control. As a professional metal tin packaging manufacturer, Esha produces tinplate, aluminum and stainless steel metal boxes, supports full OEM & ODM customization, negotiable MOQ and stable global delivery for cosmetic brands, gift merchants, hardware tool suppliers and cross-border sellers worldwide.