CSS Counter Styles Level 3 predefines some counter styles, including some that are noted as commonplace but complicated to represent with @counter-style. Ready-made Counter Styles, published by the W3C Internationalization Working Group, provides code snippets for user-defined counter styles for numbering systems used by various cultures around the world. For ease of reference, the Ready-made Counter Styles counter styles also duplicates the predefined styles from CSS Counter Styles Level 3.