diff --git a/pkg/core/region.go b/pkg/core/region.go
index ba547ca6c4d0..450fab499e68 100644
--- a/pkg/core/region.go
+++ b/pkg/core/region.go
@@ -64,6 +64,7 @@ type RegionInfo struct {
 	readBytes         uint64
 	readKeys          uint64
 	approximateSize   int64
+	approximateKvSize int64
 	approximateKeys   int64
 	interval          *pdpb.TimeInterval
 	replicationStatus *replication_modepb.RegionReplicationStatus
@@ -151,6 +152,7 @@ func RegionFromHeartbeat(heartbeat *pdpb.RegionHeartbeatRequest, opts ...RegionC
 	if heartbeat.GetApproximateSize() > 0 && regionSize < EmptyRegionApproximateSize {
 		regionSize = EmptyRegionApproximateSize
 	}
+	regionKvSize := heartbeat.GetApproximateKvSize() / units.MiB
 
 	region := &RegionInfo{
 		term:              heartbeat.GetTerm(),
@@ -164,6 +166,7 @@ func RegionFromHeartbeat(heartbeat *pdpb.RegionHeartbeatRequest, opts ...RegionC
 		readBytes:         heartbeat.GetBytesRead(),
 		readKeys:          heartbeat.GetKeysRead(),
 		approximateSize:   int64(regionSize),
+		approximateKvSize: int64(regionKvSize),
 		approximateKeys:   int64(heartbeat.GetApproximateKeys()),
 		interval:          heartbeat.GetInterval(),
 		replicationStatus: heartbeat.GetReplicationStatus(),
@@ -230,6 +233,7 @@ func (r *RegionInfo) Clone(opts ...RegionCreateOption) *RegionInfo {
 		readBytes:         r.readBytes,
 		readKeys:          r.readKeys,
 		approximateSize:   r.approximateSize,
+		approximateKvSize: r.approximateKvSize,
 		approximateKeys:   r.approximateKeys,
 		interval:          typeutil.DeepClone(r.interval, TimeIntervalFactory),
 		replicationStatus: r.replicationStatus,
@@ -520,6 +524,11 @@ func (r *RegionInfo) GetStorePeerApproximateKeys(storeID uint64) int64 {
 	return r.approximateKeys
 }
 
+// GetApproximateKvSize returns the approximate kv size of the region.
+func (r *RegionInfo) GetApproximateKvSize() int64 {
+	return r.approximateKvSize
+}
+
 // GetApproximateKeys returns the approximate keys of the region.
 func (r *RegionInfo) GetApproximateKeys() int64 {
 	return r.approximateKeys
diff --git a/pkg/core/region_option.go b/pkg/core/region_option.go
index 92820e3f5491..ba46fab94207 100644
--- a/pkg/core/region_option.go
+++ b/pkg/core/region_option.go
@@ -274,6 +274,13 @@ func SetApproximateSize(v int64) RegionCreateOption {
 	}
 }
 
+// SetApproximateKvSize sets the approximate size for the region.
+func SetApproximateKvSize(v int64) RegionCreateOption {
+	return func(region *RegionInfo) {
+		region.approximateKvSize = v
+	}
+}
+
 // SetApproximateKeys sets the approximate keys for the region.
 func SetApproximateKeys(v int64) RegionCreateOption {
 	return func(region *RegionInfo) {
diff --git a/pkg/statistics/region.go b/pkg/statistics/region.go
index 51030b676d2d..f39c58ed81cc 100644
--- a/pkg/statistics/region.go
+++ b/pkg/statistics/region.go
@@ -23,6 +23,7 @@ type RegionStats struct {
 	Count            int              `json:"count"`
 	EmptyCount       int              `json:"empty_count"`
 	StorageSize      int64            `json:"storage_size"`
+	UserStorageSize  int64            `json:"user_storage_size"`
 	StorageKeys      int64            `json:"storage_keys"`
 	StoreLeaderCount map[uint64]int   `json:"store_leader_count"`
 	StorePeerCount   map[uint64]int   `json:"store_peer_count"`
@@ -57,10 +58,12 @@ func (s *RegionStats) Observe(r *core.RegionInfo) {
 	s.Count++
 	approximateKeys := r.GetApproximateKeys()
 	approximateSize := r.GetApproximateSize()
+	approximateKvSize := r.GetApproximateKvSize()
 	if approximateSize <= core.EmptyRegionApproximateSize {
 		s.EmptyCount++
 	}
 	s.StorageSize += approximateSize
+	s.UserStorageSize += approximateKvSize
 	s.StorageKeys += approximateKeys
 	leader := r.GetLeader()
 	if leader != nil {
diff --git a/server/api/stats_test.go b/server/api/stats_test.go
index 60391b68de0d..4003f53ed9e4 100644
--- a/server/api/stats_test.go
+++ b/server/api/stats_test.go
@@ -74,6 +74,7 @@ func (suite *statsTestSuite) TestRegionStats() {
 		},
 			&metapb.Peer{Id: 101, StoreId: 1},
 			core.SetApproximateSize(100),
+			core.SetApproximateKvSize(80),
 			core.SetApproximateKeys(50),
 		),
 		core.NewRegionInfo(
@@ -90,6 +91,7 @@ func (suite *statsTestSuite) TestRegionStats() {
 			},
 			&metapb.Peer{Id: 105, StoreId: 4},
 			core.SetApproximateSize(200),
+			core.SetApproximateKvSize(180),
 			core.SetApproximateKeys(150),
 		),
 		core.NewRegionInfo(
@@ -105,6 +107,7 @@ func (suite *statsTestSuite) TestRegionStats() {
 			},
 			&metapb.Peer{Id: 107, StoreId: 5},
 			core.SetApproximateSize(1),
+			core.SetApproximateKvSize(1),
 			core.SetApproximateKeys(1),
 		),
 		core.NewRegionInfo(
@@ -119,6 +122,7 @@ func (suite *statsTestSuite) TestRegionStats() {
 			},
 			&metapb.Peer{Id: 108, StoreId: 4},
 			core.SetApproximateSize(50),
+			core.SetApproximateKvSize(30),
 			core.SetApproximateKeys(20),
 		),
 	}
@@ -139,6 +143,7 @@ func (suite *statsTestSuite) TestRegionStats() {
 		Count:            4,
 		EmptyCount:       1,
 		StorageSize:      351,
+		UserStorageSize:  291,
 		StorageKeys:      221,
 		StoreLeaderCount: map[uint64]int{1: 1, 4: 2, 5: 1},
 		StorePeerCount:   map[uint64]int{1: 3, 2: 1, 3: 1, 4: 2, 5: 2},
@@ -152,6 +157,7 @@ func (suite *statsTestSuite) TestRegionStats() {
 		Count:            2,
 		EmptyCount:       1,
 		StorageSize:      201,
+		UserStorageSize:  181,
 		StorageKeys:      151,
 		StoreLeaderCount: map[uint64]int{4: 1, 5: 1},
 		StorePeerCount:   map[uint64]int{1: 2, 4: 1, 5: 2},