diff --git a/implementations/rust/preserves/src/value/signed_integer.rs b/implementations/rust/preserves/src/value/signed_integer.rs
index d6c00f3..732feeb 100644
--- a/implementations/rust/preserves/src/value/signed_integer.rs
+++ b/implementations/rust/preserves/src/value/signed_integer.rs
@@ -81,6 +81,30 @@ impl SignedInteger {
     }
 }
 
+impl From<i32> for SignedInteger {
+    fn from(v: i32) -> Self {
+        SignedInteger(SignedIntegerRepr::I128(v.into()))
+    }
+}
+
+impl From<u32> for SignedInteger {
+    fn from(v: u32) -> Self {
+        SignedInteger(SignedIntegerRepr::I128(v.into()))
+    }
+}
+
+impl From<i64> for SignedInteger {
+    fn from(v: i64) -> Self {
+        SignedInteger(SignedIntegerRepr::I128(v.into()))
+    }
+}
+
+impl From<u64> for SignedInteger {
+    fn from(v: u64) -> Self {
+        SignedInteger(SignedIntegerRepr::I128(v.into()))
+    }
+}
+
 impl From<i128> for SignedInteger {
     fn from(v: i128) -> Self {
         SignedInteger(SignedIntegerRepr::I128(v))
@@ -151,6 +175,20 @@ impl<'a> From<&'a SignedInteger> for BigInt {
     }
 }
 
+impl TryFrom<&SignedInteger> for i32 {
+    type Error = ();
+    fn try_from(v: &SignedInteger) -> Result<Self, Self::Error> {
+        i128::try_from(v)?.try_into().map_err(|_| ())
+    }
+}
+
+impl TryFrom<&SignedInteger> for u32 {
+    type Error = ();
+    fn try_from(v: &SignedInteger) -> Result<Self, Self::Error> {
+        u128::try_from(v)?.try_into().map_err(|_| ())
+    }
+}
+
 impl TryFrom<&SignedInteger> for i64 {
     type Error = ();
     fn try_from(v: &SignedInteger) -> Result<Self, Self::Error> {