This compilation aims to document and highlight various elements of good practice in harm reduction programming designed for women who use drugs. A common thread through the strongest and most efficient approaches is demonstrated meaningful involvement of women who use drugs in planning and delivering services. This series also shows that such approaches remain, at this time, quite rare particularly in the global south (see also the global WHRIN mapping of harm reduction services for women). In highlighting good practice elements and examples, it is anticipated that this series can be used as an advocacy tool for further expansion, adaptation and replication to better meet the needs of women who use drugs worldwide.