diff --git a/internal/gm-unit/editor_body.lua b/internal/gm-unit/editor_body.lua
index ab135976b..3a4d8443b 100644
--- a/internal/gm-unit/editor_body.lua
+++ b/internal/gm-unit/editor_body.lua
@@ -34,6 +34,18 @@ function Editor_Body_Modifier:setPartModifier(indexList, value)
   -- Update the world texture
   self.target_unit.flags4.any_texture_must_be_refreshed = true
 
+  -- Manually recalculate body size
+  local new_size = self.target_unit.body.size_info.size_base
+  local caste = df.creature_raw.find(self.target_unit.race).caste[self.target_unit.caste]
+  for idx, mod_entry in ipairs(caste.body_appearance_modifiers) do
+      local t = mod_entry.modifier.type
+      if t >= 0 and t <= 2 then -- 0=HEIGHT, 1=BROADNESS, 2=LENGTH
+          local mod_val = self.target_unit.appearance.body_modifiers[idx]
+          new_size = math.floor((new_size * mod_val) / 100)
+      end
+  end
+  self.target_unit.body.size_info.size_cur = new_size
+
   self:updateChoices()
 end
 
@@ -45,6 +57,18 @@ function Editor_Body_Modifier:setBodyModifier(modifierIndex, value)
   -- Update the world texture
   self.target_unit.flags4.any_texture_must_be_refreshed = true
 
+  -- Manually recalculate body size
+  local new_size = self.target_unit.body.size_info.size_base
+  local caste = df.creature_raw.find(self.target_unit.race).caste[self.target_unit.caste]
+  for idx, mod_entry in ipairs(caste.body_appearance_modifiers) do
+      local t = mod_entry.modifier.type
+      if t >= 0 and t <= 2 then -- 0=HEIGHT, 1=BROADNESS, 2=LENGTH
+          local mod_val = self.target_unit.appearance.body_modifiers[idx]
+          new_size = math.floor((new_size * mod_val) / 100)
+      end
+  end
+  self.target_unit.body.size_info.size_cur = new_size
+
   self:updateChoices()
 end