diff --git a/src/shared/blockdev-list.c b/src/shared/blockdev-list.c
index d61b86c0c0..3c54219393 100644
--- a/src/shared/blockdev-list.c
+++ b/src/shared/blockdev-list.c
@@ -6,6 +6,7 @@
 #include "ansi-color.h"
 #include "blockdev-list.h"
 #include "blockdev-util.h"
+#include "device-private.h"
 #include "device-util.h"
 #include "strv.h"
 #include "terminal-util.h"
@@ -93,12 +94,18 @@ int blockdev_list(BlockDevListFlags flags, BlockDevice **ret_devices, size_t *re
                 }
 
                 if (ret_devices) {
-                        uint64_t diskseq = UINT64_MAX;
+                        uint64_t diskseq = UINT64_MAX, size = UINT64_MAX;
 
                         r = sd_device_get_diskseq(dev, &diskseq);
                         if (r < 0)
                                 log_debug_errno(r, "Failed to acquire diskseq of device '%s', ignoring: %m", node);
 
+                        r = device_get_sysattr_u64(dev, "size", &size);
+                        if (r < 0)
+                                log_debug_errno(r, "Failed to acquire size of device '%s', ignoring: %m", node);
+                        else
+                                size *= 512; /* the 'size' sysattr is always in multiples of 512, even on 4K sector block devices! */
+
                         if (!GREEDY_REALLOC(l, n+1))
                                 return log_oom();
 
@@ -110,6 +117,7 @@ int blockdev_list(BlockDevListFlags flags, BlockDevice **ret_devices, size_t *re
                                 .node = TAKE_PTR(m),
                                 .symlinks = TAKE_PTR(list),
                                 .diskseq = diskseq,
+                                .size = size,
                         };
 
                 } else {
diff --git a/src/shared/blockdev-list.h b/src/shared/blockdev-list.h
index c77952993e..63e9fad10d 100644
--- a/src/shared/blockdev-list.h
+++ b/src/shared/blockdev-list.h
@@ -14,6 +14,7 @@ typedef struct BlockDevice {
         char *node;
         char **symlinks;
         uint64_t diskseq;
+        uint64_t size;     /* in bytes */
 } BlockDevice;
 
 #define BLOCK_DEVICE_NULL (BlockDevice) { \