To be most accurate, measure brushes according to the following:
Length — the distance from the edge of the ferrule out to
the tip of the hair in the center of the brush.
Diameter — the distance of the hair at the opening of the
ferrule.
Width — the distance across the hair above the opening of
the ferrule.
Measure brushes while they are dry. Width is not the width of paint
stroke that the brush will make. The width of a brush stroke will vary
according to the amount of pressure used, the angle at which the brush
is held, the media used and the flexibility of the brush hair.
The charts should help you to determine the size brush you need to
purchase. If you would like to measure a brush you already own, use the
charts this way:
- Lay your brush on the line so that the line is just above the
edge of the ferrule. Use vertical line to measure width or diameter,
horizontal line to measure length. Check each side to be sure it
lies straight.
- Do not apply pressure or tilt to the brush. Brush hair should not
be spread.
- Follow the line over to read the measurement, or, if it falls
between two lines, move on to the next chart with smaller increments
until you find the exact measurement.
