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  • Mirror Catalog

      • How to Measure Your Side Mirror Glass

      Before you measure

      Measuring your side mirror correctly is the single most important step in ordering the right replacement glass. A measurement that is off by even a quarter inch can mean the new glass won't seat properly in the housing. This guide walks you through measuring for both Burco Redi-Cuts (cut-to-fit replacement glass) and Redi-Set-Go (glass pre-mounted on a backing plate).

      You'll need a tape measure or ruler that shows fractions of an inch. Measure the glass while it is still in the mirror housing if possible, and write down each number as you go.

      TO MEASURE FOR REDI-CUTS®

      Horizontal

      Measure your mirror glass. Measure horizontally from left mirror edge to right mirror edge. 

      VERTICAL

      Measure your mirror glass. Measure vertically from top mirror edge to bottom mirror edge. 

      DIAGONAL

      Measure your mirror's longest diagonal measurement. This mirror's longest measurement happens to be from the inside upper to outside lower. 

      MEASURE FOR REDI-set-go®

      HORIZONTAL

      Measure your mirror's encasement/ rim. Measure horizontally from left encasement edge to right encasement edge. 

      VERTICAL

      Measure your mirror's encasement/rim. Measure vertically from top encasement edge to bottom encasement edge. 

      DIAGONAL

      Measure your mirror's longest diagonal measurement. Be sure to include your mirror's encasement/rim. This mirror's longest measurement happens to be from the inside upper to outside lower. 

      Tips for an accurate measurement

      • Always record measurements to the nearest 1/16 inch.
      • Measure twice to confirm before ordering.
      • Note any curve — convex glass is measured flat, edge to edge.
      • Use the Burco Mirror Numbering Guide to match your measurements to a part number.

      Frequently asked questions

      Do I measure the glass or the frame? For Redi-Cuts, measure the glass only. For Redi-Set-Go, measure the full encasement including the rim.

      What if my mirror is convex or curved? Measure it flat across the widest and tallest points — don't follow the curve.

      Where do I find my part number? Use the measurements with the Burco Mirror Numbering Guide or the Mirror Finder to identify the correct replacement.