diff --git a/mlir/lib/Dialect/Vector/Transforms/VectorTransforms.cpp b/mlir/lib/Dialect/Vector/Transforms/VectorTransforms.cpp
--- a/mlir/lib/Dialect/Vector/Transforms/VectorTransforms.cpp
+++ b/mlir/lib/Dialect/Vector/Transforms/VectorTransforms.cpp
@@ -1079,12 +1079,18 @@
       if (auto sext = mat.getDefiningOp<arith::ExtSIOp>()) {
         Value trans =
             rewriter.create<vector::TransposeOp>(loc, sext.getIn(), perm);
-        return rewriter.create<arith::ExtSIOp>(loc, mat.getType(), trans);
+        VectorType newType =
+            VectorType::get(cast<VectorType>(trans.getType()).getShape(),
+                            cast<VectorType>(mat.getType()).getElementType());
+        return rewriter.create<arith::ExtSIOp>(loc, newType, trans);
       }
       if (auto zext = mat.getDefiningOp<arith::ExtUIOp>()) {
         Value trans =
             rewriter.create<vector::TransposeOp>(loc, zext.getIn(), perm);
-        return rewriter.create<arith::ExtUIOp>(loc, mat.getType(), trans);
+        VectorType newType =
+            VectorType::get(cast<VectorType>(trans.getType()).getShape(),
+                            cast<VectorType>(mat.getType()).getElementType());
+        return rewriter.create<arith::ExtUIOp>(loc, newType, trans);
       }
       return rewriter.create<vector::TransposeOp>(loc, mat, perm);
     };
diff --git a/mlir/test/Dialect/Vector/vector-contract-matmul-transforms.mlir b/mlir/test/Dialect/Vector/vector-contract-matmul-transforms.mlir
--- a/mlir/test/Dialect/Vector/vector-contract-matmul-transforms.mlir
+++ b/mlir/test/Dialect/Vector/vector-contract-matmul-transforms.mlir
@@ -42,22 +42,22 @@
   return %res : vector<4x4xi32>
 }
 
-// CHECK-LABEL: func.func @matmul_mk_kn_mn_4x4xi8_extsi_i32
-// CHECK-SAME:    ([[ARG0:%.+]]: vector<4x4xi8>, [[ARG1:%.+]]: vector<4x4xi8>, [[ARG2:%.+]]: vector<4x4xi32>)
-// CHECK-NEXT:    [[LHS:%.+]]   = arith.extsi [[ARG0]] : vector<4x4xi8> to vector<4x4xi32>
-// CHECK-NEXT:    [[TRANS:%.+]] = vector.transpose [[ARG1]], [1, 0] : vector<4x4xi8> to vector<4x4xi8>
-// CHECK-NEXT:    [[RHS:%.+]]   = arith.extsi [[TRANS]] : vector<4x4xi8> to vector<4x4xi32>
+// CHECK-LABEL: func.func @matmul_mk_kn_mn_8x16xi8_extsi_i32
+// CHECK-SAME:    ([[ARG0:%.+]]: vector<8x4xi8>, [[ARG1:%.+]]: vector<4x16xi8>, [[ARG2:%.+]]: vector<8x16xi32>)
+// CHECK-NEXT:    [[LHS:%.+]]   = arith.extsi [[ARG0]] : vector<8x4xi8> to vector<8x4xi32>
+// CHECK-NEXT:    [[TRANS:%.+]] = vector.transpose [[ARG1]], [1, 0] : vector<4x16xi8> to vector<16x4xi8>
+// CHECK-NEXT:    [[RHS:%.+]]   = arith.extsi [[TRANS]] : vector<16x4xi8> to vector<16x4xi32>
 // CHECK-NEXT:    [[RES:%.+]]   = vector.contract {{.+}} [[LHS]], [[RHS]], [[ARG2]]
 // CHECK-NEXT:    return [[RES]]
-func.func @matmul_mk_kn_mn_4x4xi8_extsi_i32(%arg0: vector<4x4xi8>, %arg1: vector<4x4xi8>, %arg2: vector<4x4xi32>) -> vector<4x4xi32> {
-  %lhs = arith.extsi %arg0: vector<4x4xi8> to vector<4x4xi32>
-  %rhs = arith.extsi %arg1: vector<4x4xi8> to vector<4x4xi32>
+func.func @matmul_mk_kn_mn_8x16xi8_extsi_i32(%arg0: vector<8x4xi8>, %arg1: vector<4x16xi8>, %arg2: vector<8x16xi32>) -> vector<8x16xi32> {
+  %lhs = arith.extsi %arg0: vector<8x4xi8> to vector<8x4xi32>
+  %rhs = arith.extsi %arg1: vector<4x16xi8> to vector<4x16xi32>
   %res = vector.contract {indexing_maps = [affine_map<(d0, d1, d2) -> (d0, d2)>,
                                            affine_map<(d0, d1, d2) -> (d2, d1)>,
                                            affine_map<(d0, d1, d2) -> (d0, d1)>],
                           iterator_types = ["parallel", "parallel", "reduction"],
-                          kind = #vector.kind<add>} %lhs, %rhs, %arg2 : vector<4x4xi32>, vector<4x4xi32> into vector<4x4xi32>
-  return %res : vector<4x4xi32>
+                          kind = #vector.kind<add>} %lhs, %rhs, %arg2 : vector<8x4xi32>, vector<4x16xi32> into vector<8x16xi32>
+  return %res : vector<8x16xi32>
 }
 
 // Check that non-square shapes are also handled.
@@ -75,22 +75,22 @@
   return %res : vector<4x4xi32>
 }
 
-// CHECK-LABEL: func.func @matmul_mk_kn_mn_4x4xi8_extui_i32
-// CHECK-SAME:    ([[ARG0:%.+]]: vector<4x4xi8>, [[ARG1:%.+]]: vector<4x4xi8>, [[ARG2:%.+]]: vector<4x4xi32>)
-// CHECK-NEXT:    [[LHS:%.+]]   = arith.extui [[ARG0]] : vector<4x4xi8> to vector<4x4xi32>
-// CHECK-NEXT:    [[TRANS:%.+]] = vector.transpose [[ARG1]], [1, 0] : vector<4x4xi8> to vector<4x4xi8>
-// CHECK-NEXT:    [[RHS:%.+]]   = arith.extui [[TRANS]] : vector<4x4xi8> to vector<4x4xi32>
+// CHECK-LABEL: func.func @matmul_mk_kn_mn_8x16xi8_extui_i32
+// CHECK-SAME:    ([[ARG0:%.+]]: vector<8x4xi8>, [[ARG1:%.+]]: vector<4x16xi8>, [[ARG2:%.+]]: vector<8x16xi32>)
+// CHECK-NEXT:    [[LHS:%.+]]   = arith.extui [[ARG0]] : vector<8x4xi8> to vector<8x4xi32>
+// CHECK-NEXT:    [[TRANS:%.+]] = vector.transpose [[ARG1]], [1, 0] : vector<4x16xi8> to vector<16x4xi8>
+// CHECK-NEXT:    [[RHS:%.+]]   = arith.extui [[TRANS]] : vector<16x4xi8> to vector<16x4xi32>
 // CHECK-NEXT:    [[RES:%.+]]   = vector.contract {{.+}} [[LHS]], [[RHS]], [[ARG2]]
 // CHECK-NEXT:    return [[RES]]
-func.func @matmul_mk_kn_mn_4x4xi8_extui_i32(%arg0: vector<4x4xi8>, %arg1: vector<4x4xi8>, %arg2: vector<4x4xi32>) -> vector<4x4xi32> {
-  %lhs = arith.extui %arg0: vector<4x4xi8> to vector<4x4xi32>
-  %rhs = arith.extui %arg1: vector<4x4xi8> to vector<4x4xi32>
+func.func @matmul_mk_kn_mn_8x16xi8_extui_i32(%arg0: vector<8x4xi8>, %arg1: vector<4x16xi8>, %arg2: vector<8x16xi32>) -> vector<8x16xi32> {
+  %lhs = arith.extui %arg0: vector<8x4xi8> to vector<8x4xi32>
+  %rhs = arith.extui %arg1: vector<4x16xi8> to vector<4x16xi32>
   %res = vector.contract {indexing_maps = [affine_map<(d0, d1, d2) -> (d0, d2)>,
                                            affine_map<(d0, d1, d2) -> (d2, d1)>,
                                            affine_map<(d0, d1, d2) -> (d0, d1)>],
                           iterator_types = ["parallel", "parallel", "reduction"],
-                          kind = #vector.kind<add>} %lhs, %rhs, %arg2 : vector<4x4xi32>, vector<4x4xi32> into vector<4x4xi32>
-  return %res : vector<4x4xi32>
+                          kind = #vector.kind<add>} %lhs, %rhs, %arg2 : vector<8x4xi32>, vector<4x16xi32> into vector<8x16xi32>
+  return %res : vector<8x16xi32>
 }
 
 // CHECK-LABEL: func.func @matmul_km_nk_mn_4x4xi32
@@ -122,23 +122,23 @@
   return %res : vector<4x4xi32>
 }
 
-// CHECK-LABEL: func.func @matmul_km_kn_mn_4x4xi8_mixed_ext_i32
-// CHECK-SAME:    ([[ARG0:%.+]]: vector<4x4xi8>, [[ARG1:%.+]]: vector<4x4xi8>, [[ARG2:%.+]]: vector<4x4xi32>)
-// CHECK-DAG:     [[LHST:%.+]] = vector.transpose [[ARG0]], [1, 0] : vector<4x4xi8> to vector<4x4xi8>
-// CHECK-DAG:     [[LHS:%.+]]  = arith.extsi [[LHST]] : vector<4x4xi8> to vector<4x4xi32>
-// CHECK-DAG:     [[RHST:%.+]] = vector.transpose [[ARG1]], [1, 0] : vector<4x4xi8> to vector<4x4xi8>
-// CHECK-DAG:     [[RHS:%.+]]  = arith.extui [[RHST]] : vector<4x4xi8> to vector<4x4xi32>
+// CHECK-LABEL: func.func @matmul_km_kn_mn_8x16xi8_mixed_ext_i32
+// CHECK-SAME:    ([[ARG0:%.+]]: vector<4x8xi8>, [[ARG1:%.+]]: vector<4x16xi8>, [[ARG2:%.+]]: vector<8x16xi32>)
+// CHECK-DAG:     [[LHST:%.+]] = vector.transpose [[ARG0]], [1, 0] : vector<4x8xi8> to vector<8x4xi8>
+// CHECK-DAG:     [[LHS:%.+]]  = arith.extsi [[LHST]] : vector<8x4xi8> to vector<8x4xi32>
+// CHECK-DAG:     [[RHST:%.+]] = vector.transpose [[ARG1]], [1, 0] : vector<4x16xi8> to vector<16x4xi8>
+// CHECK-DAG:     [[RHS:%.+]]  = arith.extui [[RHST]] : vector<16x4xi8> to vector<16x4xi32>
 // CHECK-NEXT:    [[RES:%.+]]  = vector.contract {{.+}} [[LHS]], [[RHS]], [[ARG2]]
 // CHECK-NEXT:    return [[RES]]
-func.func @matmul_km_kn_mn_4x4xi8_mixed_ext_i32(%arg0: vector<4x4xi8>, %arg1: vector<4x4xi8>, %arg2: vector<4x4xi32>) -> vector<4x4xi32> {
-  %lhs = arith.extsi %arg0 : vector<4x4xi8> to vector<4x4xi32>
-  %rhs = arith.extui %arg1 : vector<4x4xi8> to vector<4x4xi32>
+func.func @matmul_km_kn_mn_8x16xi8_mixed_ext_i32(%arg0: vector<4x8xi8>, %arg1: vector<4x16xi8>, %arg2: vector<8x16xi32>) -> vector<8x16xi32> {
+  %lhs = arith.extsi %arg0 : vector<4x8xi8> to vector<4x8xi32>
+  %rhs = arith.extui %arg1 : vector<4x16xi8> to vector<4x16xi32>
   %res = vector.contract {indexing_maps = [affine_map<(d0, d1, d2) -> (d2, d0)>,
                                            affine_map<(d0, d1, d2) -> (d2, d1)>,
                                            affine_map<(d0, d1, d2) -> (d0, d1)>],
                           iterator_types = ["parallel", "parallel", "reduction"],
-                          kind = #vector.kind<add>} %lhs, %rhs, %arg2 : vector<4x4xi32>, vector<4x4xi32> into vector<4x4xi32>
-  return %res : vector<4x4xi32>
+                          kind = #vector.kind<add>} %lhs, %rhs, %arg2 : vector<4x8xi32>, vector<4x16xi32> into vector<8x16xi32>
+  return %res : vector<8x16xi32>
 }
 
 // CHECK-LABEL: func.func @matmul_mk_nk_nm_4x4xi32