diff --git a/api/data/tree.go b/api/data/tree.go
index 277f32d..0164062 100644
--- a/api/data/tree.go
+++ b/api/data/tree.go
@@ -65,7 +65,7 @@ type BaseNodeVersion struct {
 	ParenID        uint64
 	OID            oid.ID
 	Timestamp      uint64
-	Size           uint64 // todo discuss if it is possible don't support correct obj size for ola objects
+	Size           uint64
 	ETag           string
 	MD5            string
 	FilePath       string
@@ -86,9 +86,10 @@ func (v BaseNodeVersion) IsFilledExtra() bool {
 	return v.Created != nil && v.Owner != nil
 }
 
-func (v *BaseNodeVersion) FillExtra(objInfo *ObjectInfo) {
-	v.Owner = &objInfo.Owner
-	v.Created = &objInfo.Created
+func (v *BaseNodeVersion) FillExtra(owner *user.ID, created *time.Time, realSize uint64) {
+	v.Owner = owner
+	v.Created = created
+	v.Size = realSize
 }
 
 type ObjectTaggingInfo struct {
diff --git a/api/handler/attributes.go b/api/handler/attributes.go
index 1a2c46d..a5e07b3 100644
--- a/api/handler/attributes.go
+++ b/api/handler/attributes.go
@@ -191,7 +191,7 @@ func encodeToObjectAttributesResponse(info *data.ObjectInfo, p *GetObjectAttribu
 		case storageClass:
 			resp.StorageClass = api.DefaultStorageClass
 		case objectSize:
-			resp.ObjectSize = info.Size // todo probably we need to use GetObjectSize
+			resp.ObjectSize = info.Size
 		case checksum:
 			checksumBytes, err := hex.DecodeString(info.HashSum)
 			if err != nil {
diff --git a/api/handler/object_list.go b/api/handler/object_list.go
index a386569..870b20e 100644
--- a/api/handler/object_list.go
+++ b/api/handler/object_list.go
@@ -200,10 +200,6 @@ func fillContents(src []*data.ExtendedNodeVersion, encode string, fetchOwner, md
 			StorageClass: api.DefaultStorageClass,
 		}
 
-		//if size, err := layer.GetObjectSize(obj); err == nil {
-		//	res.Size = size
-		//}
-
 		if fetchOwner {
 			owner := obj.NodeVersion.Owner.String()
 			res.Owner = &Owner{
diff --git a/api/handler/object_list_test.go b/api/handler/object_list_test.go
index c10e98a..e7e9795 100644
--- a/api/handler/object_list_test.go
+++ b/api/handler/object_list_test.go
@@ -7,6 +7,7 @@ import (
 	"net/url"
 	"sort"
 	"strconv"
+	"strings"
 	"testing"
 	"time"
 
@@ -15,6 +16,7 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer/encryption"
+	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/pkg/service/tree"
 	"github.com/stretchr/testify/require"
 	"go.uber.org/zap/zaptest"
 )
@@ -65,6 +67,102 @@ func TestListObjectNullVersions(t *testing.T) {
 	require.Equal(t, data.UnversionedObjectVersionID, result.Version[1].VersionID)
 }
 
+func TestListObjectsWithOldTreeNodes(t *testing.T) {
+	hc := prepareHandlerContext(t)
+
+	bktName, objName := "bucket-versioning-enabled", "object"
+	bktInfo := createTestBucket(hc, bktName)
+
+	srcEnc, err := encryption.NewParams([]byte("1234567890qwertyuiopasdfghjklzxc"))
+	require.NoError(t, err)
+	objInfo := createTestObject(hc, bktInfo, objName, *srcEnc)
+	_ = objInfo
+
+	prm := &tree.GetNodesParams{
+		BktInfo:    bktInfo,
+		TreeID:     "version",
+		Path:       []string{objName},
+		LatestOnly: true,
+		AllAttrs:   true,
+	}
+	nodes, err := hc.treeMock.GetNodes(hc.Context(), prm)
+	require.NoError(t, err)
+	require.Len(t, nodes, 1)
+	node := nodes[0]
+	meta := make(map[string]string, len(node.GetMeta()))
+	for _, m := range node.GetMeta() {
+		if m.GetKey() != "Created" && m.GetKey() != "Owner" {
+			meta[m.GetKey()] = string(m.GetValue())
+		}
+	}
+
+	err = hc.treeMock.MoveNode(hc.Context(), bktInfo, "version", node.GetNodeID(), node.GetParentID(), meta)
+	require.NoError(t, err)
+
+	list := listObjectsV1(hc, bktName, "", "", "", -1)
+	require.Len(t, list.Contents, 1)
+	realSize, err := layer.GetObjectSize(objInfo)
+	require.NoError(t, err)
+	require.Equal(t, objInfo.Owner.EncodeToString(), list.Contents[0].Owner.ID)
+	require.Equal(t, objInfo.Created.UTC().Format(time.RFC3339), list.Contents[0].LastModified)
+	require.Equal(t, realSize, list.Contents[0].Size)
+}
+
+func prepareObjects(hc *handlerContext, bktInfo *data.BucketInfo, prefix string, size int) []string {
+	treeID := "version"
+	parentID := uint64(0)
+	if prefix != "" {
+		for _, filename := range strings.Split(prefix, "/") {
+			nodeID, err := hc.treeMock.AddNode(hc.Context(), bktInfo, treeID, parentID, map[string]string{
+				"FileName": filename,
+			})
+			require.NoError(hc.t, err)
+			parentID = nodeID
+		}
+		prefix += "/"
+	}
+
+	objects := make([]string, size)
+
+	for i := range objects {
+		filename := "object" + strconv.Itoa(i)
+		filepath := prefix + filename
+
+		prm := layer.PrmObjectCreate{
+			Container: bktInfo.CID,
+			Filepath:  filepath,
+			Payload:   nil,
+		}
+
+		id, err := hc.tp.CreateObject(hc.Context(), prm)
+		require.NoError(hc.t, err)
+
+		newVersion := &data.NodeVersion{
+			BaseNodeVersion: data.BaseNodeVersion{
+				OID:      id,
+				ETag:     "12345678",
+				FilePath: filepath,
+			},
+			IsUnversioned: true,
+			IsCombined:    false,
+		}
+
+		_, err = hc.treeMock.AddNodeBase(hc.Context(), bktInfo, treeID, parentID, map[string]string{
+			"OID":           newVersion.OID.EncodeToString(),
+			"FileName":      filename,
+			"IsUnversioned": "true",
+		}, false)
+		require.NoError(hc.t, err)
+		objects[i] = filepath
+	}
+
+	hc.treeMock.Sort()
+
+	sort.Strings(objects)
+
+	return objects
+}
+
 func TestListObjectsContextCanceled(t *testing.T) {
 	layerCfg := layer.DefaultCachesConfigs(zaptest.NewLogger(t))
 	layerCfg.SessionList.Lifetime = time.Hour
diff --git a/api/layer/listing.go b/api/layer/listing.go
index 89ca9d9..f41b5e0 100644
--- a/api/layer/listing.go
+++ b/api/layer/listing.go
@@ -535,7 +535,13 @@ func (n *layer) initWorkerPool(ctx context.Context, size int, p commonVersionsLi
 							}
 						}
 
-						node.NodeVersion.FillExtra(oi)
+						realSize, err := GetObjectSize(oi)
+						if err != nil {
+							reqLog.Debug("failed to get real object size", zap.Error(err))
+							realSize = oi.Size
+						}
+
+						node.NodeVersion.FillExtra(&oi.Owner, &oi.Created, realSize)
 
 						select {
 						case <-ctx.Done():