diff --git a/webapp/public/locales/en/main.json b/webapp/public/locales/en/main.json
index 5e5d65edbd..f7651f99b1 100644
--- a/webapp/public/locales/en/main.json
+++ b/webapp/public/locales/en/main.json
@@ -644,6 +644,7 @@
   "xpansion.amplPresolve": "Ampl presolve",
   "xpansion.amplSolverBoundsFrequency": "Ampl solve bounds frequency",
   "xpansion.relativeGap": "Relative gap",
+  "xpansion.batchSize": "Batch size",
   "xpansion.solver": "Solver",
   "xpansion.timeLimit": "Time limit (in hours)",
   "xpansion.logLevel": "Log level",
diff --git a/webapp/public/locales/fr/main.json b/webapp/public/locales/fr/main.json
index 314d3c9b03..d60556d964 100644
--- a/webapp/public/locales/fr/main.json
+++ b/webapp/public/locales/fr/main.json
@@ -644,6 +644,7 @@
   "xpansion.amplPresolve": "Ampl presolve",
   "xpansion.amplSolverBoundsFrequency": "Ampl solve bounds frequency",
   "xpansion.relativeGap": "Gap d'optimalité relatif",
+  "xpansion.batchSize": "Taille du batch",
   "xpansion.solver": "Solveur",
   "xpansion.timeLimit": "Limite de temps (en heures)",
   "xpansion.logLevel": "Niveau de log",
diff --git a/webapp/src/components/App/Singlestudy/explore/Xpansion/Settings/SettingsForm.tsx b/webapp/src/components/App/Singlestudy/explore/Xpansion/Settings/SettingsForm.tsx
index 4afd50488d..b03440c7b4 100644
--- a/webapp/src/components/App/Singlestudy/explore/Xpansion/Settings/SettingsForm.tsx
+++ b/webapp/src/components/App/Singlestudy/explore/Xpansion/Settings/SettingsForm.tsx
@@ -185,6 +185,16 @@ function SettingsForm(props: PropType) {
               }}
               optional
             />
+            <TextField
+              type="number"
+              label={t("xpansion.batchSize")}
+              variant="filled"
+              value={currentSettings.batch_size || ""}
+              onChange={(e) =>
+                handleChange("batch_size", parseInt(e.target.value, 10))
+              }
+              sx={{ mb: 1 }}
+            />
           </SelectFields>
           <TextField
             type="number"
diff --git a/webapp/src/components/App/Singlestudy/explore/Xpansion/types.ts b/webapp/src/components/App/Singlestudy/explore/Xpansion/types.ts
index a525757a9b..6a8c8dddb5 100644
--- a/webapp/src/components/App/Singlestudy/explore/Xpansion/types.ts
+++ b/webapp/src/components/App/Singlestudy/explore/Xpansion/types.ts
@@ -20,6 +20,7 @@ export interface XpansionSettings {
   solver?: string;
   log_level?: number;
   timelimit?: number;
+  batch_size?: number;
   sensitivity_config?: XpansionSensitivitySettings;
 }