This article serves to supplement published measurement data for Namibian passerine species and subspecies, where possible also by sex. It presents a summary of single observer sourced bird ringing in Namibia, between 2002 and 2022. This report collated data of 160 species, totaling 16 262 individuals and 64 475 measurements (head, culmen, tarsus, tail, wing and mass). Included in this list are measurements for five near-endemic species and 123 subspecies. A comparison between similar curated lists of southern African records was made, with significant differences being noted between many of the reported measurements. Keywords: Passeriformes, biometrics, sexual dimorphism, bird ringing, methodology, data management, Namibia, centralised biometric database.