The Device Tray Controls the First Move
A mobile phone box has one unusually strict job: hold a thin, high-value device securely while making it easy to lift out without pressing on the screen, camera area, side buttons or ports. That first movement matters more than adding extra empty space or simply choosing thicker board.
The tray or insert should support the phone at stable contact points, keep the device centered and leave a clear removal path. A pull tab, finger notch or exposed edge can help, but it has to work with the actual phone profile. A deep cavity with no usable grip can make a secure box frustrating to open. A shallow cavity can make the phone look elegant but allow it to move when the box is tilted.
Size from the production device as it will actually be packed. Include any protective film, sleeve or pre-applied accessory that changes the maximum profile. Camera modules, raised lenses and side controls can matter even when the nominal length and width are almost identical between models.
There is no universal clearance that works for every phone tray. The fit should be proven with the real device or an accurate production-equivalent model. The phone should seat without force, stay located when the box changes orientation and lift out without scraping a sensitive surface.
Custom Packly can support this stage with dieline help, free 3D mockups and paid fully custom pre-production samples where a physical fit check is needed.















