diff --git a/collector/diskstats_linux.go b/collector/diskstats_linux.go
index daca55d968..de4f868f34 100644
--- a/collector/diskstats_linux.go
+++ b/collector/diskstats_linux.go
@@ -103,7 +103,7 @@ func NewDiskstatsCollector(logger *slog.Logger) (Collector, error) {
 		infoDesc: typedDesc{
 			desc: prometheus.NewDesc(prometheus.BuildFQName(namespace, diskSubsystem, "info"),
 				"Info of /sys/block/<block_device>.",
-				[]string{"device", "major", "minor", "path", "wwn", "model", "serial", "revision", "rotational"},
+				[]string{"device", "major", "minor", "path", "wwn", "model", "serial", "revision", "rotational", "size_bytes"},
 				nil,
 			), valueType: prometheus.GaugeValue,
 		},
@@ -296,6 +296,15 @@ func (c *diskstatsCollector) Update(ch chan<- prometheus.Metric) error {
 			c.logger.Debug("Failed to get block device queue stats", "device", dev, "err", err)
 		}
 
+		sizeBytes := ""
+		if size, err := c.fs.SysBlockDeviceSize(dev); err != nil {
+			if !os.IsNotExist(err) {
+				c.logger.Debug("Failed to get block device size", "device", dev, "err", err)
+			}
+		} else {
+			sizeBytes = strconv.FormatUint(size, 10)
+		}
+
 		ch <- c.infoDesc.mustNewConstMetric(1.0, dev,
 			fmt.Sprint(stats.MajorNumber),
 			fmt.Sprint(stats.MinorNumber),
@@ -305,6 +314,7 @@ func (c *diskstatsCollector) Update(ch chan<- prometheus.Metric) error {
 			serial,
 			info[udevIDRevision],
 			strconv.FormatUint(queueStats.Rotational, 2),
+			sizeBytes,
 		)
 
 		statCount := stats.IoStatsCount - 3 // Total diskstats record count, less MajorNumber, MinorNumber and DeviceName
diff --git a/collector/diskstats_linux_test.go b/collector/diskstats_linux_test.go
index 08a5024c8a..df4bf5a415 100644
--- a/collector/diskstats_linux_test.go
+++ b/collector/diskstats_linux_test.go
@@ -112,21 +112,21 @@ node_disk_flush_requests_time_seconds_total{device="sdc"} 1.944
 node_disk_flush_requests_total{device="sdc"} 1555
 # HELP node_disk_info Info of /sys/block/<block_device>.
 # TYPE node_disk_info gauge
-node_disk_info{device="dm-0",major="252",minor="0",model="",path="",revision="",rotational="0",serial="",wwn=""} 1
-node_disk_info{device="dm-1",major="252",minor="1",model="",path="",revision="",rotational="0",serial="",wwn=""} 1
-node_disk_info{device="dm-2",major="252",minor="2",model="",path="",revision="",rotational="0",serial="",wwn=""} 1
-node_disk_info{device="dm-3",major="252",minor="3",model="",path="",revision="",rotational="0",serial="",wwn=""} 1
-node_disk_info{device="dm-4",major="252",minor="4",model="",path="",revision="",rotational="0",serial="",wwn=""} 1
-node_disk_info{device="dm-5",major="252",minor="5",model="",path="",revision="",rotational="0",serial="",wwn=""} 1
-node_disk_info{device="mmcblk0",major="179",minor="0",model="",path="platform-df2969f3.mmc",revision="",rotational="0",serial="0x83e36d93",wwn=""} 1
-node_disk_info{device="mmcblk0p1",major="179",minor="1",model="",path="platform-df2969f3.mmc",revision="",rotational="0",serial="0x83e36d93",wwn=""} 1
-node_disk_info{device="mmcblk0p2",major="179",minor="2",model="",path="platform-df2969f3.mmc",revision="",rotational="0",serial="0x83e36d93",wwn=""} 1
-node_disk_info{device="nvme0n1",major="259",minor="0",model="SAMSUNG EHFTF55LURSY-000Y9",path="pci-0000:02:00.0-nvme-1",revision="4NBTUY95",rotational="0",serial="S252B6CU1HG3M1",wwn="eui.p3vbbiejx5aae2r3"} 1
-node_disk_info{device="sda",major="8",minor="0",model="TOSHIBA_KSDB4U86",path="pci-0000:3b:00.0-sas-phy7-lun-0",revision="0102",rotational="1",serial="2160A0D5FVGG",wwn="0x7c72382b8de36a64"} 1
-node_disk_info{device="sdb",major="8",minor="16",model="SuperMicro_SSD",path="pci-0000:00:1f.2-ata-1",revision="0R",rotational="0",serial="SMC0E1B87ABBB16BD84E",wwn="0xe1b87abbb16bd84e"} 1
-node_disk_info{device="sdc",major="8",minor="32",model="INTEL_SSDS9X9SI0",path="pci-0000:00:1f.2-ata-4",revision="0100",rotational="0",serial="3EWB5Y25CWQWA7EH1U",wwn="0x58907ddc573a5de"} 1
-node_disk_info{device="sr0",major="11",minor="0",model="Virtual_CDROM0",path="pci-0000:00:14.0-usb-0:1.1:1.0-scsi-0:0:0:0",revision="1.00",rotational="0",serial="AAAABBBBCCCC1",wwn=""} 1
-node_disk_info{device="vda",major="254",minor="0",model="",path="pci-0000:00:06.0",revision="",rotational="0",serial="",wwn=""} 1
+node_disk_info{device="dm-0",major="252",minor="0",model="",path="",revision="",rotational="0",serial="",size_bytes="",wwn=""} 1
+node_disk_info{device="dm-1",major="252",minor="1",model="",path="",revision="",rotational="0",serial="",size_bytes="",wwn=""} 1
+node_disk_info{device="dm-2",major="252",minor="2",model="",path="",revision="",rotational="0",serial="",size_bytes="",wwn=""} 1
+node_disk_info{device="dm-3",major="252",minor="3",model="",path="",revision="",rotational="0",serial="",size_bytes="",wwn=""} 1
+node_disk_info{device="dm-4",major="252",minor="4",model="",path="",revision="",rotational="0",serial="",size_bytes="",wwn=""} 1
+node_disk_info{device="dm-5",major="252",minor="5",model="",path="",revision="",rotational="0",serial="",size_bytes="",wwn=""} 1
+node_disk_info{device="mmcblk0",major="179",minor="0",model="",path="platform-df2969f3.mmc",revision="",rotational="0",serial="0x83e36d93",size_bytes="",wwn=""} 1
+node_disk_info{device="mmcblk0p1",major="179",minor="1",model="",path="platform-df2969f3.mmc",revision="",rotational="0",serial="0x83e36d93",size_bytes="",wwn=""} 1
+node_disk_info{device="mmcblk0p2",major="179",minor="2",model="",path="platform-df2969f3.mmc",revision="",rotational="0",serial="0x83e36d93",size_bytes="",wwn=""} 1
+node_disk_info{device="nvme0n1",major="259",minor="0",model="SAMSUNG EHFTF55LURSY-000Y9",path="pci-0000:02:00.0-nvme-1",revision="4NBTUY95",rotational="0",serial="S252B6CU1HG3M1",size_bytes="",wwn="eui.p3vbbiejx5aae2r3"} 1
+node_disk_info{device="sda",major="8",minor="0",model="TOSHIBA_KSDB4U86",path="pci-0000:3b:00.0-sas-phy7-lun-0",revision="0102",rotational="1",serial="2160A0D5FVGG",size_bytes="1000204886016",wwn="0x7c72382b8de36a64"} 1
+node_disk_info{device="sdb",major="8",minor="16",model="SuperMicro_SSD",path="pci-0000:00:1f.2-ata-1",revision="0R",rotational="0",serial="SMC0E1B87ABBB16BD84E",size_bytes="",wwn="0xe1b87abbb16bd84e"} 1
+node_disk_info{device="sdc",major="8",minor="32",model="INTEL_SSDS9X9SI0",path="pci-0000:00:1f.2-ata-4",revision="0100",rotational="0",serial="3EWB5Y25CWQWA7EH1U",size_bytes="",wwn="0x58907ddc573a5de"} 1
+node_disk_info{device="sr0",major="11",minor="0",model="Virtual_CDROM0",path="pci-0000:00:14.0-usb-0:1.1:1.0-scsi-0:0:0:0",revision="1.00",rotational="0",serial="AAAABBBBCCCC1",size_bytes="",wwn=""} 1
+node_disk_info{device="vda",major="254",minor="0",model="",path="pci-0000:00:06.0",revision="",rotational="0",serial="",size_bytes="",wwn=""} 1
 # HELP node_disk_io_now The number of I/Os currently in progress.
 # TYPE node_disk_io_now gauge
 node_disk_io_now{device="dm-0"} 0
diff --git a/collector/fixtures/sys.ttar b/collector/fixtures/sys.ttar
index 9ec673a0f4..3977b05644 100644
--- a/collector/fixtures/sys.ttar
+++ b/collector/fixtures/sys.ttar
@@ -826,6 +826,11 @@ Lines: 1
 none
 Mode: 644
 # ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: sys/block/sda/size
+Lines: 1
+1953525168
+Mode: 664
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 Directory: sys/bus
 Mode: 755
 # ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
@@ -2231,16 +2236,6 @@ Lines: 1
 Samsung SSD 970 PRO 512GB
 Mode: 444
 # ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-Path: sys/class/nvme/nvme0/serial
-Lines: 1
-S680HF8N190894I
-Mode: 444
-# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-Path: sys/class/nvme/nvme0/state
-Lines: 1
-live
-Mode: 444
-# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 Directory: sys/class/nvme/nvme0/nvme0c0n0
 Mode: 755
 # ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
@@ -2249,11 +2244,6 @@ Lines: 1
 optimized
 Mode: 444
 # ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-Path: sys/class/nvme/nvme0/nvme0c0n0/size
-Lines: 1
-3906250000
-Mode: 444
-# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 Path: sys/class/nvme/nvme0/nvme0c0n0/nuse
 Lines: 1
 488281250
@@ -2267,6 +2257,21 @@ Lines: 1
 4096
 Mode: 644
 # ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: sys/class/nvme/nvme0/nvme0c0n0/size
+Lines: 1
+3906250000
+Mode: 444
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: sys/class/nvme/nvme0/serial
+Lines: 1
+S680HF8N190894I
+Mode: 444
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Path: sys/class/nvme/nvme0/state
+Lines: 1
+live
+Mode: 444
+# ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 Directory: sys/class/power_supply
 Mode: 755
 # ttar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -