This document is intended for students who wish to conduct granulometric analyses using dry or wet column sieving according to current standards.It is derived from courses delivered at the Laboratory of Geomorphology and Coastal Environment of the Practical School of Higher Studies in Dinard during the Techniques of Coastal Geomorphology Studies workshop, which was held annually until 2005, and the Master’s Research in Life and Earth Sciences, specializing in Environment and Biodiversity Management.The authors would like to thank Emeritus Professors Fernand Verger and Louis-Robert Lafon for initiating this course and Dr. Bruno Caline for organizing the annual Sedimentation of Current Environments workshop for engineers in Mont-Saint-Michel Bay. The laboratory equipment photographs were taken by Thibaut Nebout, and the other photographs were taken by Jérôme Fournier.The main granulometric indices and descriptive statistics can be calculated using the G2Sd package developed by Régis Gallon and Jérôme Fournier, available at the following address: http://cran.r-project.org/web/packages/G2Sd/index.html. Readers are encouraged to send their corrections and comments to fournier@mnhn.fr to help improve this document.