diff --git a/comment_on_pr.sh b/comment_on_pr.sh
index 7edb23f..0c72671 100755
--- a/comment_on_pr.sh
+++ b/comment_on_pr.sh
@@ -13,7 +13,7 @@ util_path="${GITHUB_ACTION_PATH:-.}/utils.sh"
 json_to_md_rows() {
 	jq --raw-output \
 		".$1[]"' | "| `\(.name)` | \(.size) | \(.narSize) |"' "$2" |
-		numfmt --to=iec-i --field=4,6
+		numfmt --suffix=B --to=iec-i --field=4,6
 }
 
 # USAGE: json_to_md_rows <FIELD> [JSON_FILE]
@@ -22,7 +22,7 @@ json_to_md_rows() {
 json_to_md_rows_and_change() {
 	jq --raw-output \
 		".$1[]"' | "| `\(.name)` | \(.size) | \(.sizeChange) | \(.narSize) | \(.narSizeChange) |"' |
-		numfmt --to=iec-i --field=4,6,8,10
+		numfmt --suffix=B --to=iec-i --field=4,6,8,10
 }
 
 # USAGE: has_elements <FIELD> <JSON_FILE>