Look up the pattern before reading another full guide.
These pages are deliberately compact. They are for the moment when you need a fit definition, a failure-pattern check, or the next diagnostic step—not another general press-on tutorial.
Versioned Brand Size Charts
Source-dated millimeter charts tied to the exact brand, product/system, shape, and check date. Built for auditability, not a fake universal size code.
Use with the width comparatorOpen reference →Fit geometry3-Point Fit Check
Check width, C-curve, and contact before glue or tabs. Use this when a press-on looks right from above but still rocks, pinches, or springs up.
Use before adhesiveOpen reference →Failure patternLifting Pattern Chart
Start with the first edge that opens—cuticle, side, center, free edge, or full pop-off—and choose the variable to inspect before changing the whole routine.
Use after a failureOpen reference →VocabularyFit Glossary
A focused set of terms that actually affect press-on sizing and troubleshooting: sidewall, C-curve, contact, rocking, free edge, base shape, and more.
Use when a term is unclearOpen reference →Use symptom routing, not random fixes.
The Start Here map separates fit, lifting, adhesive, daily-life, and reuse problems so you only test one variable at a time.