diff --git a/src/libslic3r/Model.cpp b/src/libslic3r/Model.cpp
index fec6e422c..a25062c48 100644
--- a/src/libslic3r/Model.cpp
+++ b/src/libslic3r/Model.cpp
@@ -1,3 +1,4 @@
+#include "Model.hpp"
 #include "libslic3r.h"
 #include "Exception.hpp"
 #include "Model.hpp"
@@ -1701,9 +1702,6 @@ std::string ModelObject::get_export_filename() const
 
 TriangleMeshStats ModelObject::get_object_stl_stats() const
 {
-    if (this->volumes.size() == 1)
-        return this->volumes[0]->mesh().stats();
-
     TriangleMeshStats full_stats;
     full_stats.volume = 0.f;
 
@@ -1718,7 +1716,8 @@ TriangleMeshStats ModelObject::get_object_stl_stats() const
 
         // another used satistics value
         if (volume->is_model_part()) {
-            full_stats.volume           += stats.volume;
+            Transform3d trans = instances[0]->get_matrix() * volume->get_matrix();
+            full_stats.volume           += stats.volume * std::fabs(trans.matrix().block(0, 0, 3, 3).determinant());
             full_stats.number_of_parts  += stats.number_of_parts;
         }
     }
diff --git a/src/slic3r/GUI/Plater.cpp b/src/slic3r/GUI/Plater.cpp
index 04ccbb183..eb3c9bc53 100644
--- a/src/slic3r/GUI/Plater.cpp
+++ b/src/slic3r/GUI/Plater.cpp
@@ -165,7 +165,7 @@ ObjectInfo::ObjectInfo(wxWindow *parent) :
 //     grid_sizer->AddGrowableCol(3, 1);
 
     auto init_info_label = [parent, grid_sizer](wxStaticText **info_label, wxString text_label) {
-        auto *text = new wxStaticText(parent, wxID_ANY, text_label+":");
+        auto *text = new wxStaticText(parent, wxID_ANY, text_label + (text_label.empty() ? "" : ":"));
         text->SetFont(wxGetApp().small_font());
         *info_label = new wxStaticText(parent, wxID_ANY, "");
         (*info_label)->SetFont(wxGetApp().small_font());
@@ -177,7 +177,7 @@ ObjectInfo::ObjectInfo(wxWindow *parent) :
     init_info_label(&info_size, _L("Size"));
     label_volume = init_info_label(&info_volume, _L("Volume"));
     init_info_label(&info_facets, _L("Facets"));
-    label_materials = init_info_label(&info_materials, _L("Materials"));
+    label_materials = init_info_label(&info_materials, /*_L("Materials")*/"");
     Add(grid_sizer, 0, wxEXPAND);
 
     info_manifold = new wxStaticText(parent, wxID_ANY, "");
@@ -1199,32 +1199,47 @@ void Sidebar::update_objects_list_extruder_column(size_t extruders_count)
 
 void Sidebar::show_info_sizer()
 {
-    if (!p->plater->is_single_full_object_selection() ||
-        m_mode < comExpert ||
-        p->plater->model().objects.empty()) {
+    Selection& selection = wxGetApp().plater()->canvas3D()->get_selection();
+    ModelObjectPtrs objects = p->plater->model().objects;
+    int obj_idx = selection.get_object_idx();
+
+    if (m_mode < comExpert || objects.empty() || obj_idx < 0 || obj_idx > 1000 ||
+        objects[obj_idx]->volumes.empty() ||                                            // hack to avoid crash when deleting the last object on the bed
+        (selection.is_single_full_object() && objects[obj_idx]->instances.size()> 1) ||
+        !(selection.is_single_full_instance() || selection.is_single_volume())) {
         p->object_info->Show(false);
         return;
     }
 
-    int obj_idx = p->plater->get_selected_object_idx();
+    const ModelObject* model_object = objects[obj_idx];
 
-    const ModelObject* model_object = p->plater->model().objects[obj_idx];
-    // hack to avoid crash when deleting the last object on the bed
-    if (model_object->volumes.empty())
-    {
-        p->object_info->Show(false);
-        return;
-    }
+    int inst_idx = selection.get_instance_idx();
+    assert(inst_idx >= 0);
 
     bool imperial_units = wxGetApp().app_config->get("use_inches") == "1";
     double koef = imperial_units ? ObjectManipulation::mm_to_in : 1.0f;
 
-    auto size = model_object->bounding_box().size();
-    p->object_info->info_size->SetLabel(wxString::Format("%.2f x %.2f x %.2f",size(0)*koef, size(1)*koef, size(2)*koef));
-    p->object_info->info_materials->SetLabel(wxString::Format("%d", static_cast<int>(model_object->materials_count())));
+    ModelVolume* vol = nullptr;
+    Transform3d t;
+    if (selection.is_single_volume()) {
+        std::vector<int> obj_idxs, vol_idxs;
+        wxGetApp().obj_list()->get_selection_indexes(obj_idxs, vol_idxs);
+        assert(vol_idxs.size() == 1);
+        vol = model_object->volumes[vol_idxs[0]];
+        t = model_object->instances[inst_idx]->get_matrix() * vol->get_matrix();
+    }
 
-    const auto& stats = model_object->get_object_stl_stats();
-    p->object_info->info_volume->SetLabel(wxString::Format("%.2f", stats.volume*pow(koef,3)));
+    Vec3d size = vol ? vol->mesh().transformed_bounding_box(t).size() : model_object->instance_bounding_box(inst_idx).size();
+    p->object_info->info_size->SetLabel(wxString::Format("%.2f x %.2f x %.2f", size(0)*koef, size(1)*koef, size(2)*koef));
+//    p->object_info->info_materials->SetLabel(wxString::Format("%d", static_cast<int>(model_object->materials_count())));
+
+    const TriangleMeshStats& stats = vol ? vol->mesh().stats() : model_object->get_object_stl_stats();
+
+    double volume_val = stats.volume;
+    if (vol)
+        volume_val *= std::fabs(t.matrix().block(0, 0, 3, 3).determinant());
+
+    p->object_info->info_volume->SetLabel(wxString::Format("%.2f", volume_val * pow(koef,3)));
     p->object_info->info_facets->SetLabel(format_wxstr(_L_PLURAL("%1% (%2$d shell)", "%1% (%2$d shells)", stats.number_of_parts),
                                                        static_cast<int>(model_object->facets_count()), stats.number_of_parts));