Parts of a Dartboard – Rings, Bull and Segments Labeled

All 9 parts on the diagram

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The board 7

Inner bull (bullseye) The small circle in the middle of the board. It scores 50.
Outer bull The ring round the inner bull. It scores 25.
Triple ring The narrow inner ring. It scores three times the segment's number.
Double ring The narrow outer ring. It scores double the segment's number.
Single area The wide parts of a segment. A dart here scores the segment's number once.
Number ring A wire ring that carries the numbers 1 to 20. Clips hold it to the board.
Spider The web of wires that divides the board into its scoring areas.

Segment, set-up 2

Segment One of the 20 equal slices. Each has its own number, from 1 to 20.
Throwing line (oche) The line the player stands behind to throw. Its old name is the oche.

How this list was compiled: Every name checked on 2026-10-01, a name kept only where two independent sources use it: the World Darts Federation's Playing and Tournament Rules, 20th revised edition, sections 4 and 6, https://dartswdf.com/rules (bull scoring 50, outer centre ring scoring 25, treble ring, double ring, segment, the wires, the oche); Wikipedia, Darts and Glossary of darts, text only, https://en.wikipedia.org/wiki/Darts and https://en.wikipedia.org/wiki/Glossary_of_darts (inner bull or bullseye, outer bull or single bull, triple or treble, double, single areas, the 20 numbered sections, spider, oche or throw line); a children's encyclopedia, read through archive.org's full-text search, https://archive.org/details/newbookofknowle004scho (inner bull or bull's-eye, outer bull, triple ring, double ring); five darts books read the same way, https://archive.org/details/dartsamericansty0000fred (the number ring and its clips), https://archive.org/details/dartsbible0000unse (the wire spider, scoring segments, the oche or throwing line), https://archive.org/details/americandartsorg0000care_f9d8 (double ring, triple ring, throwing line) and https://archive.org/details/dartsunlimited0000mcle (twenty equal pieces, toe line); a record book of darts, https://archive.org/details/guinnessbookofda0000brow (the spider; oche, pronounced okky); a book on soft-tip darts, https://archive.org/details/electronicsoftti0000unse (single inner and outer bed, double ring, triple ring); and a retailer's catalog, https://archive.org/details/argos-1989-spring-summer (number ring). Not an official publication of any rule body. Licence: own work

The drawing: Drawn for this site on 2026-10-01 from plain geometry: the standard clock pattern of numbers, no maker's mark, nothing traced. Licence: own work

How it works

These are the parts of a dartboard. The first drawing is the board face on, from the bull at the center out to the number ring. The second shows one segment drawn large and the throwing line.

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From the center outward

Start at the center. The inner bull is the small circle and the outer bull is the ring round it. Twenty segments fan out from there, each with a number on the number ring. Every segment is crossed by two narrow bands: the triple ring about halfway out and the double ring at its outer end. The wide parts between them are the single areas. The wires that mark all these edges are called the spider.

Triple ring and treble ring are the same ring. Treble is the British word, and both are accepted.
The throwing line has an old name, the oche, pronounced okky.

Questions and answers

What are the parts of a dartboard called?

From the center outward: the inner bull, the outer bull, the inner single area, the triple ring, the outer single area and the double ring. The wires between them are the spider, and the numbers sit on the number ring.

What is the middle of a dartboard called?

The bull, or bullseye. It has two parts. The small inner circle, the inner bull, scores 50. The ring round it, the outer bull, scores 25.

What are the rings on a dartboard?

Two narrow rings cross every segment. The inner one is the triple ring, which scores three times the segment's number. The one at the outer edge is the double ring, which scores double.

What is the wire on a dartboard called?

The spider. It is the web of wires that divides the face of the board into its scoring areas. The separate wire ring that carries the numbers is the number ring.