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Dartboard Distance & Measurements: Standard Regulation

26 February 2026• 6 min read• 14 views
A deep dive into the specific measurements of a regulation dartboard, from the width of the trebles to the diameter of the bullseye.

Ever wondered if a treble 20 is really that small? Spoilers: Yes, it is. Here are the official dimensions of a standard "bristle" dartboard.

  • Overall Diameter: 17.75 inches
  • Treble Ring Width: 8mm
  • Double Ring Width: 8mm
  • Outer Bullseye: 31.8mm diameter
  • Inner Bullseye (Double Bull): 12.7mm diameter