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Decorative and candle shapes

B11 bulb shape and size

B11 is the large blunt-tip decorative bulb designation. Its nominal maximum diameter is 1.375 inches. B11 is wider than B10. The base, voltage, light output, and exact overall length come from the individual lamp specification.

Representative family profile and nominal maximum diameter only. Overall length is not to scale, and the base is intentionally omitted.

Dimensions

What B11 tells you

Shape
large blunt-tip decorative bulb
Nominal diameter
1.375 in (35 mm)
Typical bases
E12, E26
Common uses
chandeliers, pendants, wall sconces

The diameter is part of the naming system, not a full dimension drawing. Individual models can differ in overall length, neck profile, optics, and manufacturing tolerance. Use the maker's drawing when the fit is close.

At the fixture

Four other details to record

  1. Read the base code and voltage on the old lamp or fixture label.
  2. Compare the published maximum diameter and overall length with the available space.
  3. Record lumens, beam angle where relevant, color temperature, and dimming behavior.
  4. Look for the enclosure, location, temperature, or vibration rating required by the fixture.

Easy to miss

Notes for B11

  • B11 is wider than B10.
  • Verify glass or shade clearance.

Sources

Reference method

BulbMatch uses the U.S. eighth-inch naming convention as a nominal shape reference and keeps model-specific dimensions separate.