Ring Specification
| Minimum internal diameter | 4.20 mm |
| Maximum internal diameter | 4.40 mm |
| Wall thickness | 0.60 – 0.90 mm |
| Ring height | 3.85 – 4.00 mm |
The WBO adopted in 1997 a 6-year cycle ring colour sequence. At the WBO meeting in November 2002 it was decided to reduce this to 5-year cycle by dropping the silver colour and adding the International Pantone Colour Code to each of the five WBO Ring Colours. This 5-year cycle to commence with the 2004 season. At the 2005 meeting it was decided to change the colour Gold to Violet commencing as from 2009.
Colour |
Pantone Code |
Year |
Year |
Year |
Year |
Black |
Black 2U2X |
2002 |
2007 |
2012 |
2017 |
Dark Blue |
301 U |
2003 |
2008 |
2013 |
2018 |
Gold |
Yellow U |
2004 |
|
|
|
Violet |
249 U | 2009 | 2014 | 2019 | |
Dark Green |
363 U |
2005 |
2010 |
2015 |
2020 |
Red |
1797 U |
2006 |
2011 |
2016 |
2021 |
Member societies are strongly reminded that when ordering rings from any ring manufacturer to specify the exact WBO ring colour and the Pantone Code as well as the ring specification to avoid any misunderstanding by ring manufacturers.
© WBO/2003