The database includes 1-minute records of Drop Size Distribution (DSD) collected by the disdrometer network along the italian peninsula. The disdrometers belong to seven italian institutions that in 2021 decided to bring together their know-how, experience, and instruments for measuring DSDs giving birth to the Italian Group of Disdrometry (in Italian it reads: Gruppo Italiano Disdrometria, GID, https://www.gid-net.it/). The database cover a period of 9 years (from 2012 to 2021) although not all the disdrometers have measurements for the whole period. In order to obtain uniform and high quality DSDs, the same processing has been adopted to all the disdrometer raw data. The processing along with the characteristics of the italian disdrometer network and of the relative DSD database have been presented in the data paper "Database of the Italian disdrometer network" submitted on September 2022 to the Journal "Earth System Science Data". Most of the data have been also used for a validation study of the precipitation products of the Dual-frequency Precipitation Radar (DPR) aboard the Core Satellite of the Global Precipitation Measurement (GPM) mission. The results of the validation study are reported in the paper "Validation of GPM Rainfall and Drop Size Distribution Products through Disdrometers in Italy" published on May 2021 in the Journal "Remote Sensing".