diff --git a/onnxruntime/core/providers/dml/DmlExecutionProvider/src/Operators/DmlOperatorSlice.cpp b/onnxruntime/core/providers/dml/DmlExecutionProvider/src/Operators/DmlOperatorSlice.cpp
index c26f223634..5a2e9d888b 100644
--- a/onnxruntime/core/providers/dml/DmlExecutionProvider/src/Operators/DmlOperatorSlice.cpp
+++ b/onnxruntime/core/providers/dml/DmlExecutionProvider/src/Operators/DmlOperatorSlice.cpp
@@ -15,7 +15,7 @@ public:
     {
         const uint32_t inputCount = kernelInfo.GetInputCount();
         ML_CHECK_VALID_ARGUMENT((opsetVersion <  10 && inputCount == 1)
-                             || (opsetVersion == 10 && inputCount >= 3 && inputCount <= 5));
+                             || (opsetVersion >= 10 && opsetVersion <= 11 && inputCount >= 3 && inputCount <= 5));
         ML_CHECK_VALID_ARGUMENT(kernelInfo.GetOutputCount() == 1);
 
         std::vector<std::optional<uint32_t>> kernelInputIndices = { 0 }; // Only bind GPU to first 'data' tensor.
@@ -65,5 +65,5 @@ void CALLBACK QuerySlice(IMLOperatorSupportQueryContextPrivate* context, bool *i
 
 DML_OP_DEFINE_CREATION_FUNCTION(Slice7,  DmlOperatorSliceTemplate<7>);
 DML_OP_DEFINE_CREATION_FUNCTION(Slice10, DmlOperatorSliceTemplate<10>);
-DML_OP_DEFINE_CREATION_FUNCTION(Slice11, DmlOperatorSliceTemplate<10>);
+DML_OP_DEFINE_CREATION_FUNCTION(Slice11, DmlOperatorSliceTemplate<11>);
 } // namespace Dml
diff --git a/onnxruntime/core/providers/dml/OperatorAuthorHelper/OperatorHelper.cpp b/onnxruntime/core/providers/dml/OperatorAuthorHelper/OperatorHelper.cpp
index 185020ce24..f4123c97d0 100644
--- a/onnxruntime/core/providers/dml/OperatorAuthorHelper/OperatorHelper.cpp
+++ b/onnxruntime/core/providers/dml/OperatorAuthorHelper/OperatorHelper.cpp
@@ -55,6 +55,7 @@ void ReadCpuLocalTensorIntoInt32(
     case MLOperatorTensorDataType::Int64:
         {
             const int64_t* data = tensor.GetData<int64_t>();
+            result.reserve(elementCount);
             for (auto d : gsl::make_span(data, data + elementCount))
             {
                 result.push_back(gsl::narrow_cast<int32_t>(d));
diff --git a/onnxruntime/core/providers/dml/OperatorAuthorHelper/OperatorHelper.h b/onnxruntime/core/providers/dml/OperatorAuthorHelper/OperatorHelper.h
index 4e62ba9bb8..1f89948e34 100644
--- a/onnxruntime/core/providers/dml/OperatorAuthorHelper/OperatorHelper.h
+++ b/onnxruntime/core/providers/dml/OperatorAuthorHelper/OperatorHelper.h
@@ -562,7 +562,7 @@ public:
             ends = operatorInfo.GetOptionalAttributeVectorInt32(AttrName::Ends);
             axes = operatorInfo.GetOptionalAttributeVectorInt32(AttrName::Axes);
         }
-        else if (opsetVersion == 10)
+        else if (opsetVersion == 10 || opsetVersion == 11)
         {
             // Read starts, ends, and axes from tensors.
             ReadIndexTensors(operatorInfo, /*out*/ starts, /*out*/ ends, /*out*/ axes, /*out*/ steps);
@@ -615,6 +615,9 @@ public:
             end = std::min(end, dim);
             int size = std::max(end - start, 0);
 
+            // Set the input window offsets/sizes, and compute output size based on input
+            // window size (rounding up).
+            // e.g. a window size 13 and step 3 yields 5 output elements.
             int absoluteStride = abs(stride);
             m_outputDimensions[dimIndex] = (size / absoluteStride) + (size % absoluteStride != 0);
             m_offsets[dimIndex] = start;