diff --git a/crates/store/re_types/definitions/rerun/components/length.fbs b/crates/store/re_types/definitions/rerun/components/length.fbs
index 54c509a7f956..0b4d9f209ec8 100644
--- a/crates/store/re_types/definitions/rerun/components/length.fbs
+++ b/crates/store/re_types/definitions/rerun/components/length.fbs
@@ -9,7 +9,8 @@ namespace rerun.components;
 struct Length (
   "attr.python.aliases": "float",
   "attr.python.array_aliases": "float, npt.NDArray[np.float32]",
-  "attr.rust.derive": "Copy, PartialEq, PartialOrd, bytemuck::Pod, bytemuck::Zeroable"
+  "attr.rust.derive": "Copy, PartialEq, PartialOrd, bytemuck::Pod, bytemuck::Zeroable",
+  "attr.rust.repr": "transparent"
 ) {
   length: rerun.datatypes.Float32 (order: 100);
 }
diff --git a/crates/store/re_types/src/components/length.rs b/crates/store/re_types/src/components/length.rs
index 2000b1803cfe..d30925082cda 100644
--- a/crates/store/re_types/src/components/length.rs
+++ b/crates/store/re_types/src/components/length.rs
@@ -23,6 +23,7 @@ use ::re_types_core::{DeserializationError, DeserializationResult};
 /// Measured in its local coordinate system; consult the archetype in use to determine which
 /// axis or part of the entity this is the length of.
 #[derive(Clone, Debug, Copy, PartialEq, PartialOrd, bytemuck::Pod, bytemuck::Zeroable)]
+#[repr(transparent)]
 pub struct Length(pub crate::datatypes::Float32);
 
 impl ::re_types_core::SizeBytes for Length {