A holder can look correct on screen and still clash with a phone case, charging connector or volume button. Measure the phone as you use it, then define its supports, angle and cable space. Those inputs make the first design checkable.
This guide concerns a freestanding desk or shelf holder. It is not for a vehicle, bicycle or mounting where release could cause harm. The measurements below are planning examples; no physical holder was tested.
Download the English project worksheet. Open it as UTF-8 CSV, replace the guide context with your project inputs and record observations separately from acceptance decisions. Blank cells do not indicate a passed check.
Describe how and where you use the phone
Record portrait, landscape or both; reading notifications, video calls and charging; and the available desk width and depth. A narrow windowsill needs a different footprint from a large desk. Identify the viewing direction and whether you frequently move the holder. A freestanding stand is a different design from a clamp or screw-mounted bracket.
Draw a side view with the desk, base and phone, plus an arrow showing the viewing direction. This gives “viewing angle” an explicit reference.
Measure the phone and case as one object
Measure maximum width, height and thickness with the case fitted. Include raised screen edges and the camera bump, measuring several places where the case tapers. Record button and port positions from a known edge, rounded corners that touch supports, and the camera projection. A model name is not a measurement: cases for the same phone differ.
Add front, side and bottom photographs beside a ruler, but retain measured values. Choose clearance as a design input, not a proven printer tolerance. Use the distinction between clearance and tolerance, then prepare prototype acceptance checks for inserting, removing and charging the phone on one recorded revision.
Give the connector and cable their own space
Measure the actual connector housing, including width, thickness and projection below the phone. Record which way the cable exits. A right-angle connector and a straight connector need different openings.
Allow space beyond the plug before the cable bends. Check opening width in the front view and desk clearance in the side view. State whether charging remains connected and whether one-handed removal requires unplugging first. A port-sized hole does not necessarily accommodate the plug body or fingers.
Define the angle and support zones
Measure the angle between the screen plane and desktop, or draw another unambiguous reference. Make a separate sketch for each orientation. A portrait support may cover a button or speaker in landscape. State which orientation takes priority if both cannot be supported without compromise.
A hypothetical 65-degree angle is not an ergonomic recommendation. Try your chosen position with a simple cardboard mock-up before treating it as fixed. Mark contact zones that leave the screen, buttons, speakers, microphone, ports and camera accessible. The front lip must restrain the phone without covering useful screen area.
If use with and without a case is required, measure both configurations. One loose slot may allow unwanted movement; one tight slot may mark the case or fail to fit. Identify the visible face too, because support removal and print orientation can affect its appearance.
Check footprint and tipping direction
Show roughly where the phone's weight sits above the base. A tall phone leaning behind a short footprint can tip when touched. Draw arrows for tapping the screen and pulling the cable. A non-slip pad or extra mass is a possible design choice, not a verified stability solution.
| Input | Fictional working value | Check before designing |
|---|---|---|
| Phone with case | 78 × 12 × 162 mm | Measure your actual combination |
| Orientation | Portrait | Confirm whether landscape is required |
| Screen angle | 65° from desktop | Assess with a simple mock-up |
| Plug housing | 12 × 7 × 20 mm below phone | Measure the actual plug |
| Free cable space | 30 mm beyond plug | Check bend and collisions |
| Maximum footprint | 105 × 90 mm | Check available desk area |
These values describe an editorial example, not a product or successful prototype.
Assess the trial against specific observations
Check slot width, support height, base width and cable opening first. Then place and remove the phone, reach buttons, connect the cable and assess the view. Record expected, measured and decision for each point. “Fits well” is less useful than “the plug housing touches the desk” or “the volume button sits 2 mm behind the support”.
If you already have a model, check the STL's units and overall size. Accurate phone measurements cannot rescue a mis-scaled export. Stop while the case or cable is undecided, angle references are missing, modes conflict, the cable must kink or the footprint exceeds the space.
Request the desk accessory with its real constraints
For a custom home or desk accessory, send the sketch, phone-and-case dimensions, actual plug and available space. Identify fixed requirements and adjustable choices such as base depth. Agree to assess insertion, removal, cable access and tipping in the intended desk use. Changing the case or cable creates a new configuration to check; one successful combination does not validate all variants.