Measure the installed path first
- Tune the guitar and measure outer-string centers at the nut and bridge witness points.
- Measure from the nut witness point to the intended pickup center along the scale direction.
- Remove hardware only with permission and record the cavity's smallest clear length, width, and usable depth.
- Measure the candidate body, tabs, cover, wire exit, ring opening, and screw centers from its current manufacturer drawing.
Keep envelopes separate
A pickup body can pass through a ring but still collide at its tabs, lead, springs, or cavity corner. A pole-spacing match does not prove that the cover, baseplate, ring, screw pattern, wiring, or installed height fits.
Start with the string-spread projector, then check pole spacing, route clearance, and ring and mount geometry.
Scope of this guide
Measure the string path, pickup body, cavity, ring opening, and screw centers without mixing their datums. Use How to Measure Pickup Fit to make a repeatable decision for this named task, not to impose one specification on every instrument.
Practical example
A candidate can clear a ring opening yet collide at a baseplate tab or wire exit. Record each envelope separately, verify the exact current maker drawing, and stop if a physical overlay reveals an unmodeled corner, spring, screw, or cavity wall.
Record the conditions
For How to Measure Pickup Fit, write down instrument type, tuning, installed strings, relevant hardware, climate when material, physical datum, unit, tool resolution, and the result before and after change. A result from this guide is comparable only when its method travels with the number.
Verification checklist
- For How to Measure Pickup Fit, confirm the starting state and exact question.
- Repeat its critical measurements from the same reference.
- Compare its result with direct observation and applicable maker documentation.
- Change one reversible variable where the task permits.
- Retest the named symptom and preserve unresolved exceptions.
Related workflow
- string spread at pickup — continue when that page answers the next unresolved measurement or decision.
- pickup route clearance checker — continue when that page answers the next unresolved measurement or decision.
- pickup ring mount fit — continue when that page answers the next unresolved measurement or decision.
Limits
How to Measure Pickup Fit cannot inspect hidden structure, material condition, service history, or player technique. Stop this guide workflow for electrical hazards, abnormal resistance, structural movement, conflicting readings, or unplanned material removal.