diff --git a/Cargo.lock b/Cargo.lock
index b73e607..7bd8c90 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -173,7 +173,7 @@ checksum = "d9c4f5dac5e15c24eb999c26181a6ca40b39fe946cbe4c263c7209467bc83af2"
 
 [[package]]
 name = "folgezettel"
-version = "0.2.0"
+version = "0.3.0"
 dependencies = [
  "camino",
  "clap",
diff --git a/Cargo.toml b/Cargo.toml
index 381aa20..e48532a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "folgezettel"
-version = "0.2.0"
+version = "0.3.0"
 edition = "2024"
 description = "Index Folgezettel identifiers from note files"
 readme = "README.md"
diff --git a/src/id.rs b/src/id.rs
index 518222e..d20c69b 100644
--- a/src/id.rs
+++ b/src/id.rs
@@ -21,7 +21,9 @@ impl Ord for Segment {
     fn cmp(&self, other: &Self) -> Ordering {
         match (self, other) {
             (Self::Number(left), Self::Number(right)) => left.cmp(right),
-            (Self::Letter(left), Self::Letter(right)) => left.cmp(right),
+            (Self::Letter(left), Self::Letter(right)) => {
+                left.len().cmp(&right.len()).then_with(|| left.cmp(right))
+            }
             (Self::Separator(left), Self::Separator(right)) => left.cmp(right),
             _ => {
                 let rank = |segment: &Segment| match segment {
@@ -205,6 +207,18 @@ fn normalizes_uppercase_letters() {
     );
 }
 
+#[test]
+fn orders_letter_runs_by_length_then_value() {
+    let mut ids: Vec<_> = ["1aa", "1z", "1ab", "1a", "1b"]
+        .iter()
+        .map(|id| FolgezettelId::parse(id).unwrap())
+        .collect();
+    ids.sort();
+
+    let sorted: Vec<String> = ids.iter().map(FolgezettelId::to_string).collect();
+    assert_eq!(sorted, ["1a", "1b", "1z", "1aa", "1ab"]);
+}
+
 #[test]
 fn handles_separators() {
     assert_eq!(