diff --git a/Documentation/git-repo.adoc b/Documentation/git-repo.adoc
index 70f0a6d2e4..287eee4b93 100644
--- a/Documentation/git-repo.adoc
+++ b/Documentation/git-repo.adoc
@@ -50,6 +50,7 @@ supported:
 +
 * Reference counts categorized by type
 * Reachable object counts categorized by type
+* Total inflated size of reachable objects by type
 
 +
 The output format can be chosen through the flag `--format`. Three formats are
diff --git a/builtin/repo.c b/builtin/repo.c
index 9c61bc3e17..8da321a386 100644
--- a/builtin/repo.c
+++ b/builtin/repo.c
@@ -2,6 +2,8 @@
 
 #include "builtin.h"
 #include "environment.h"
+#include "hex.h"
+#include "odb.h"
 #include "parse-options.h"
 #include "path-walk.h"
 #include "progress.h"
@@ -211,6 +213,7 @@ struct object_values {
 
 struct object_stats {
 	struct object_values type_counts;
+	struct object_values inflated_sizes;
 };
 
 struct repo_structure {
@@ -423,6 +426,15 @@ static void structure_keyvalue_print(struct repo_structure *stats,
 	printf("objects.tags.count%c%" PRIuMAX "%c", key_delim,
 	       (uintmax_t)stats->objects.type_counts.tags, value_delim);
 
+	printf("objects.commits.inflated_size%c%" PRIuMAX "%c", key_delim,
+	       (uintmax_t)stats->objects.inflated_sizes.commits, value_delim);
+	printf("objects.trees.inflated_size%c%" PRIuMAX "%c", key_delim,
+	       (uintmax_t)stats->objects.inflated_sizes.trees, value_delim);
+	printf("objects.blobs.inflated_size%c%" PRIuMAX "%c", key_delim,
+	       (uintmax_t)stats->objects.inflated_sizes.blobs, value_delim);
+	printf("objects.tags.inflated_size%c%" PRIuMAX "%c", key_delim,
+	       (uintmax_t)stats->objects.inflated_sizes.tags, value_delim);
+
 	fflush(stdout);
 }
 
@@ -486,6 +498,7 @@ static void structure_count_references(struct ref_stats *stats,
 }
 
 struct count_objects_data {
+	struct object_database *odb;
 	struct object_stats *stats;
 	struct progress *progress;
 };
@@ -495,20 +508,39 @@ static int count_objects(const char *path UNUSED, struct oid_array *oids,
 {
 	struct count_objects_data *data = cb_data;
 	struct object_stats *stats = data->stats;
+	size_t inflated_total = 0;
 	size_t object_count;
 
+	for (size_t i = 0; i < oids->nr; i++) {
+		struct object_info oi = OBJECT_INFO_INIT;
+		unsigned long inflated;
+
+		oi.sizep = &inflated;
+
+		if (odb_read_object_info_extended(data->odb, &oids->oid[i], &oi,
+						  OBJECT_INFO_SKIP_FETCH_OBJECT |
+						  OBJECT_INFO_QUICK) < 0)
+			continue;
+
+		inflated_total += inflated;
+	}
+
 	switch (type) {
 	case OBJ_TAG:
 		stats->type_counts.tags += oids->nr;
+		stats->inflated_sizes.tags += inflated_total;
 		break;
 	case OBJ_COMMIT:
 		stats->type_counts.commits += oids->nr;
+		stats->inflated_sizes.commits += inflated_total;
 		break;
 	case OBJ_TREE:
 		stats->type_counts.trees += oids->nr;
+		stats->inflated_sizes.trees += inflated_total;
 		break;
 	case OBJ_BLOB:
 		stats->type_counts.blobs += oids->nr;
+		stats->inflated_sizes.blobs += inflated_total;
 		break;
 	default:
 		BUG("invalid object type");
@@ -526,6 +558,7 @@ static void structure_count_objects(struct object_stats *stats,
 {
 	struct path_walk_info info = PATH_WALK_INFO_INIT;
 	struct count_objects_data data = {
+		.odb = repo->objects,
 		.stats = stats,
 	};
 
diff --git a/t/t1901-repo-structure.sh b/t/t1901-repo-structure.sh
index 55fd13ad1b..33237822fd 100755
--- a/t/t1901-repo-structure.sh
+++ b/t/t1901-repo-structure.sh
@@ -73,7 +73,7 @@ test_expect_success 'repository with references and objects' '
 	)
 '
 
-test_expect_success 'keyvalue and nul format' '
+test_expect_success SHA1 'keyvalue and nul format' '
 	test_when_finished "rm -rf repo" &&
 	git init repo &&
 	(
@@ -90,6 +90,10 @@ test_expect_success 'keyvalue and nul format' '
 		objects.trees.count=42
 		objects.blobs.count=42
 		objects.tags.count=1
+		objects.commits.inflated_size=9225
+		objects.trees.inflated_size=28554
+		objects.blobs.inflated_size=453
+		objects.tags.inflated_size=132
 		EOF
 
 		git repo structure --format=keyvalue >out 2>err &&