diff --git a/torchx/components/structured_arg.py b/torchx/components/structured_arg.py
index b857624ab..6c1851cc0 100644
--- a/torchx/components/structured_arg.py
+++ b/torchx/components/structured_arg.py
@@ -191,12 +191,12 @@ def parse_from(h: str, j: str) -> "StructuredJArgument":
 
             .. doctest::
 
-                >>> str(StructuredJArgument.parse_from(h="aws_trn1.32xl", j="2"))
+                >>> str(StructuredJArgument.parse_from(h="aws_trn1.32xlarge", j="2"))
                 Traceback (most recent call last):
                     ...
-                ValueError: nproc_per_node cannot be inferred from GPU count. `trn1.32xl` is not a GPU instance. ...
+                ValueError: nproc_per_node cannot be inferred from GPU count. `trn1.32xlarge` is not a GPU instance. ...
 
-                >>> str(StructuredJArgument.parse_from(h="aws_trn1.32xl", j="2x16"))
+                >>> str(StructuredJArgument.parse_from(h="aws_trn1.32xlarge", j="2x16"))
                 '2x16'
 
         """
diff --git a/torchx/components/test/structured_arg_test.py b/torchx/components/test/structured_arg_test.py
index 40e535a34..c62374743 100644
--- a/torchx/components/test/structured_arg_test.py
+++ b/torchx/components/test/structured_arg_test.py
@@ -81,14 +81,14 @@ def test_create(self) -> None:
         )
         self.assertEqual(
             StructuredJArgument(nnodes=2, nproc_per_node=8),
-            StructuredJArgument.parse_from(h="aws_trn1.2xl", j="2x8"),
+            StructuredJArgument.parse_from(h="aws_trn1.2xlarge", j="2x8"),
         )
 
         with self.assertRaisesRegex(
             ValueError,
-            "nproc_per_node cannot be inferred from GPU count. `aws_trn1.32xl` is not a GPU instance.",
+            "nproc_per_node cannot be inferred from GPU count. `aws_trn1.32xlarge` is not a GPU instance.",
         ):
-            StructuredJArgument.parse_from(h="aws_trn1.32xl", j="2")
+            StructuredJArgument.parse_from(h="aws_trn1.32xlarge", j="2")
 
         with self.assertRaisesRegex(ValueError, "Invalid format for `-j"):
             StructuredJArgument.parse_from(h="aws_p4d.24xlarge", j="2x2x2")
diff --git a/torchx/specs/named_resources_aws.py b/torchx/specs/named_resources_aws.py
index c3e45b6dc..821b2ea5c 100644
--- a/torchx/specs/named_resources_aws.py
+++ b/torchx/specs/named_resources_aws.py
@@ -192,13 +192,15 @@ def aws_g5_48xlarge() -> Resource:
     )
 
 
-def aws_trn1_2xl() -> Resource:
-    return Resource(cpu=8, gpu=0, memMB=32 * GiB, capabilities={K8S_ITYPE: "trn1.2xl"})
+def aws_trn1_2xlarge() -> Resource:
+    return Resource(
+        cpu=8, gpu=0, memMB=32 * GiB, capabilities={K8S_ITYPE: "trn1.2xlarge"}
+    )
 
 
-def aws_trn1_32xl() -> Resource:
+def aws_trn1_32xlarge() -> Resource:
     return Resource(
-        cpu=128, gpu=0, memMB=512 * GiB, capabilities={K8S_ITYPE: "trn1.32xl"}
+        cpu=128, gpu=0, memMB=512 * GiB, capabilities={K8S_ITYPE: "trn1.32xlarge"}
     )
 
 
@@ -226,6 +228,6 @@ def aws_trn1_32xl() -> Resource:
     "aws_g5.12xlarge": aws_g5_12xlarge,
     "aws_g5.24xlarge": aws_g5_24xlarge,
     "aws_g5.48xlarge": aws_g5_48xlarge,
-    "aws_trn1.2xl": aws_trn1_2xl,
-    "aws_trn1.32xl": aws_trn1_32xl,
+    "aws_trn1.2xlarge": aws_trn1_2xlarge,
+    "aws_trn1.32xlarge": aws_trn1_32xlarge,
 }
diff --git a/torchx/specs/test/named_resources_aws_test.py b/torchx/specs/test/named_resources_aws_test.py
index d7d3b9755..1829f9e32 100644
--- a/torchx/specs/test/named_resources_aws_test.py
+++ b/torchx/specs/test/named_resources_aws_test.py
@@ -31,8 +31,8 @@
     aws_p4d_24xlarge,
     aws_p4de_24xlarge,
     aws_t3_medium,
-    aws_trn1_2xl,
-    aws_trn1_32xl,
+    aws_trn1_2xlarge,
+    aws_trn1_32xlarge,
     EFA_DEVICE,
     GiB,
     K8S_ITYPE,
@@ -156,13 +156,13 @@ def test_aws_g5(self) -> None:
         self.assertEqual(g5_48.memMB, g5_12.memMB * 4)
 
     def test_aws_trn1(self) -> None:
-        trn1_2 = aws_trn1_2xl()
+        trn1_2 = aws_trn1_2xlarge()
 
         self.assertEqual(8, trn1_2.cpu)
         self.assertEqual(0, trn1_2.gpu)
         self.assertEqual(32 * GiB, trn1_2.memMB)
 
-        trn1_32 = aws_trn1_32xl()
+        trn1_32 = aws_trn1_32xlarge()
         self.assertEqual(trn1_32.cpu, trn1_2.cpu * 16)
         self.assertEqual(trn1_32.gpu, trn1_2.gpu)
         self.assertEqual(trn1_32.memMB, trn1_2.memMB * 16)