diff --git a/crates/clvm-utils/src/lib.rs b/crates/clvm-utils/src/lib.rs
index 5d642a3e1..ebeca6c7c 100644
--- a/crates/clvm-utils/src/lib.rs
+++ b/crates/clvm-utils/src/lib.rs
@@ -26,8 +26,12 @@
 
 mod curried_program;
 mod curry_tree_hash;
+mod owned_atom;
+mod sized_atom;
 mod tree_hash;
 
 pub use curried_program::*;
 pub use curry_tree_hash::*;
+pub use owned_atom::*;
+pub use sized_atom::*;
 pub use tree_hash::*;
diff --git a/crates/clvm-utils/src/owned_atom.rs b/crates/clvm-utils/src/owned_atom.rs
new file mode 100644
index 000000000..624770fbe
--- /dev/null
+++ b/crates/clvm-utils/src/owned_atom.rs
@@ -0,0 +1,92 @@
+use std::ops::Deref;
+
+use clvm_traits::{ClvmDecoder, ClvmEncoder, FromClvm, FromClvmError, ToClvm, ToClvmError};
+
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct OwnedAtom(Vec<u8>);
+
+impl OwnedAtom {
+    pub fn new(data: Vec<u8>) -> Self {
+        Self(data)
+    }
+
+    pub fn into_inner(self) -> Vec<u8> {
+        self.0
+    }
+}
+
+impl AsRef<[u8]> for OwnedAtom {
+    fn as_ref(&self) -> &[u8] {
+        &self.0
+    }
+}
+
+impl From<Vec<u8>> for OwnedAtom {
+    fn from(data: Vec<u8>) -> Self {
+        Self(data)
+    }
+}
+
+impl From<OwnedAtom> for Vec<u8> {
+    fn from(atom: OwnedAtom) -> Self {
+        atom.0
+    }
+}
+
+impl Deref for OwnedAtom {
+    type Target = [u8];
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
+impl<N> ToClvm<N> for OwnedAtom {
+    fn to_clvm(&self, encoder: &mut impl ClvmEncoder<Node = N>) -> Result<N, ToClvmError> {
+        encoder.encode_atom(self)
+    }
+}
+
+impl<N> FromClvm<N> for OwnedAtom {
+    fn from_clvm(decoder: &impl ClvmDecoder<Node = N>, node: N) -> Result<Self, FromClvmError> {
+        decoder
+            .decode_atom(&node)
+            .map(|atom| Self::new(atom.as_ref().to_vec()))
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    use clvmr::{
+        serde::{node_from_bytes, node_to_bytes},
+        Allocator,
+    };
+
+    #[test]
+    fn test_to_clvm() {
+        let a = &mut Allocator::new();
+
+        let ptr = OwnedAtom::new(Vec::new()).to_clvm(a).unwrap();
+        let bytes = node_to_bytes(a, ptr).unwrap();
+        assert_eq!(hex::encode(bytes), "80".to_owned());
+
+        let ptr = OwnedAtom::new(b"hello".to_vec()).to_clvm(a).unwrap();
+        let bytes = node_to_bytes(a, ptr).unwrap();
+        assert_eq!(hex::encode(bytes), "8568656c6c6f".to_owned());
+    }
+
+    #[test]
+    fn test_from_clvm() {
+        let a = &mut Allocator::new();
+
+        let ptr = node_from_bytes(a, &hex::decode("80").unwrap()).unwrap();
+        let value = OwnedAtom::from_clvm(a, ptr).unwrap();
+        assert_eq!(value, OwnedAtom::new(Vec::new()));
+
+        let ptr = node_from_bytes(a, &hex::decode("8568656c6c6f").unwrap()).unwrap();
+        let value = OwnedAtom::from_clvm(a, ptr).unwrap();
+        assert_eq!(value, OwnedAtom::new(b"hello".to_vec()));
+    }
+}
diff --git a/crates/clvm-utils/src/sized_atom.rs b/crates/clvm-utils/src/sized_atom.rs
new file mode 100644
index 000000000..5cc29c56a
--- /dev/null
+++ b/crates/clvm-utils/src/sized_atom.rs
@@ -0,0 +1,98 @@
+use std::ops::Deref;
+
+use clvm_traits::{ClvmDecoder, ClvmEncoder, FromClvm, FromClvmError, ToClvm, ToClvmError};
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub struct SizedAtom<const LEN: usize>([u8; LEN]);
+
+impl<const LEN: usize> SizedAtom<LEN> {
+    pub fn new(data: [u8; LEN]) -> Self {
+        Self(data)
+    }
+
+    pub fn as_bytes(self) -> [u8; LEN] {
+        self.0
+    }
+}
+
+impl<const LEN: usize> AsRef<[u8]> for SizedAtom<LEN> {
+    fn as_ref(&self) -> &[u8] {
+        &self.0
+    }
+}
+
+impl<const LEN: usize> Deref for SizedAtom<LEN> {
+    type Target = [u8];
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
+impl<const LEN: usize> From<[u8; LEN]> for SizedAtom<LEN> {
+    fn from(data: [u8; LEN]) -> Self {
+        Self(data)
+    }
+}
+
+impl<const LEN: usize> From<SizedAtom<LEN>> for [u8; LEN] {
+    fn from(atom: SizedAtom<LEN>) -> Self {
+        atom.0
+    }
+}
+
+impl<N, const LEN: usize> ToClvm<N> for SizedAtom<LEN> {
+    fn to_clvm(&self, encoder: &mut impl ClvmEncoder<Node = N>) -> Result<N, ToClvmError> {
+        encoder.encode_atom(self)
+    }
+}
+
+impl<N, const LEN: usize> FromClvm<N> for SizedAtom<LEN> {
+    fn from_clvm(decoder: &impl ClvmDecoder<Node = N>, node: N) -> Result<Self, FromClvmError> {
+        let atom = decoder.decode_atom(&node)?;
+        let bytes = atom.as_ref();
+
+        Ok(Self::new(bytes.try_into().map_err(|_| {
+            FromClvmError::WrongAtomLength {
+                expected: LEN,
+                found: bytes.len(),
+            }
+        })?))
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    use clvmr::{
+        serde::{node_from_bytes, node_to_bytes},
+        Allocator,
+    };
+
+    #[test]
+    fn test_to_clvm() {
+        let a = &mut Allocator::new();
+
+        let ptr = SizedAtom::new([]).to_clvm(a).unwrap();
+        let bytes = node_to_bytes(a, ptr).unwrap();
+        assert_eq!(hex::encode(bytes), "80".to_owned());
+
+        let ptr = SizedAtom::new(*b"hello").to_clvm(a).unwrap();
+        let bytes = node_to_bytes(a, ptr).unwrap();
+        assert_eq!(hex::encode(bytes), "8568656c6c6f".to_owned());
+    }
+
+    #[test]
+    fn test_from_clvm() {
+        let a = &mut Allocator::new();
+
+        let ptr = node_from_bytes(a, &hex::decode("80").unwrap()).unwrap();
+        let value = SizedAtom::from_clvm(a, ptr).unwrap();
+        assert_eq!(value, SizedAtom::new([]));
+
+        let ptr = node_from_bytes(a, &hex::decode("8568656c6c6f").unwrap()).unwrap();
+        let value = SizedAtom::from_clvm(a, ptr).unwrap();
+        assert_eq!(value, SizedAtom::new(*b"hello"));
+    }
+}