diff --git a/invesalius/constants.py b/invesalius/constants.py
index 37005dcfb..de6822fe8 100644
--- a/invesalius/constants.py
+++ b/invesalius/constants.py
@@ -1020,6 +1020,7 @@
     "mep_colormap": "Viridis",
     "gaussian_sharpness": 0.4,
     "gaussian_radius": 20,
+    "dimensions_size": 20,
     "bounds": None,
     "colormap_range_uv": {"min": 50, "low": 200, "mid": 600, "max": 1000},
 }
diff --git a/invesalius/data/visualization/mep_visualizer.py b/invesalius/data/visualization/mep_visualizer.py
index f11ecbbe9..03fe26fb7 100644
--- a/invesalius/data/visualization/mep_visualizer.py
+++ b/invesalius/data/visualization/mep_visualizer.py
@@ -72,8 +72,6 @@ def __init__(self):
 
         self.is_navigating = False
 
-        self.dims_size = 20
-
         self._config_params = deepcopy(const.DEFAULT_MEP_CONFIG_PARAMS)
         self.__bind_events()
         self._LoadUserParameters()
@@ -193,7 +191,7 @@ def InterpolateData(self):
         bounds = np.array(self._config_params["bounds"])
         gaussian_sharpness = self._config_params["gaussian_sharpness"]
         gaussian_radius = self._config_params["gaussian_radius"]
-        dims_size = self.dims_size
+        dims_size = self._config_params["dimensions_size"]
         dims = np.array([dims_size, dims_size, dims_size])
 
         box = vtkImageData()
diff --git a/invesalius/gui/preferences.py b/invesalius/gui/preferences.py
index d9887fbb7..6861d34dc 100644
--- a/invesalius/gui/preferences.py
+++ b/invesalius/gui/preferences.py
@@ -343,6 +343,29 @@ def InitMEPMapping(self, event):
             ]
         )
 
+        # Dimensions size line
+        lbl_dims_size = wx.StaticText(bsizer_mep.GetStaticBox(), -1, _("Dimensions size:"))
+        self.spin_dims_size = wx.SpinCtrl(bsizer_mep.GetStaticBox(), -1, "", size=wx.Size(64, 23))
+        self.spin_dims_size.Enable(1)
+        self.spin_dims_size.SetIncrement(5)
+        self.spin_dims_size.SetRange(10, 100)
+        self.spin_dims_size.SetValue(self.conf.get("dimensions_size"))
+
+        self.spin_dims_size.Bind(
+            wx.EVT_TEXT, partial(self.OnSelectDimsSize, ctrl=self.spin_dims_size)
+        )
+        self.spin_dims_size.Bind(
+            wx.EVT_SPINCTRL, partial(self.OnSelectDimsSize, ctrl=self.spin_dims_size)
+        )
+
+        line_dims_size = wx.BoxSizer(wx.HORIZONTAL)
+        line_dims_size.AddMany(
+            [
+                (lbl_dims_size, 1, wx.EXPAND | wx.GROW | wx.TOP | wx.RIGHT | wx.LEFT, 0),
+                (self.spin_dims_size, 0, wx.ALL | wx.EXPAND | wx.GROW, 0),
+            ]
+        )
+
         # Select Colormap Line
         lbl_colormap = wx.StaticText(bsizer_mep.GetStaticBox(), -1, _("Select Colormap:"))
         lbl_colormap.SetFont(wx.Font(9, wx.DEFAULT, wx.NORMAL, wx.BOLD))
@@ -477,6 +500,7 @@ def InitMEPMapping(self, event):
                 (surface_sel_sizer, 0, wx.GROW | wx.EXPAND | wx.LEFT | wx.RIGHT | wx.TOP, 5),
                 (line_gaussian_radius, 0, wx.GROW | wx.EXPAND | wx.LEFT | wx.RIGHT | wx.TOP, 5),
                 (line_std_dev, 0, wx.GROW | wx.EXPAND | wx.LEFT | wx.RIGHT | wx.TOP, 5),
+                (line_dims_size, 0, wx.GROW | wx.EXPAND | wx.LEFT | wx.RIGHT | wx.TOP, 5),
                 (colormap_sizer, 0, wx.GROW | wx.EXPAND | wx.LEFT | wx.RIGHT | wx.TOP, 5),
             ]
         )
@@ -515,6 +539,11 @@ def OnSelectGaussianRadius(self, evt, ctrl):
         # Save the configuration
         self.session.SetConfig("mep_configuration", self.conf)
 
+    def OnSelectDimsSize(self, evt, ctrl):
+        self.conf["dimensions_size"] = ctrl.GetValue()
+        # Save the configuration
+        self.session.SetConfig("mep_configuration", self.conf)
+
     def OnSelectColormapRange(self, evt, ctrl, key):
         self.conf["colormap_range_uv"][key] = ctrl.GetValue()
         self.session.SetConfig("mep_configuration", self.conf)