The present invention relates to a method for determining a size grid for anelastic veincompression orthesis model, said method comprising the following steps:a) determination of N morphological parameters, N being greater than or equalto 2；b) acquisition of a set of values of said parameters for a sample of atargetedpopulation of individuals, each individual of the sample being associated withanindividual point supplying, for each parameter, a value of said parameter；c) independently of the steps a) and b), determination of a rate of coverageof saidsample to be covered by said grid, "desired coverage rate"；d) determination of a set of coverage zones, each coverage zone being a set ofindividual points relating to a set of individuals for which a same orthesisaccordingto said model is adapted and thus corresponding to a size adapted to said setofindividuals；the number of coverage zones being determined such that the percentage ofindividualpoints included in at least one coverage zone is greater than or equal to saiddesiredcoverage rate,the set of sizes corresponding to said coverage zones defining said size grid.
