diff --git a/static/app/components/events/interfaces/performance/spanEvidenceKeyValueList.spec.tsx b/static/app/components/events/interfaces/performance/spanEvidenceKeyValueList.spec.tsx
index 233e674082d2f9..39f8d54e7b5df6 100644
--- a/static/app/components/events/interfaces/performance/spanEvidenceKeyValueList.spec.tsx
+++ b/static/app/components/events/interfaces/performance/spanEvidenceKeyValueList.spec.tsx
@@ -673,7 +673,7 @@ describe('SpanEvidenceKeyValueList', () => {
       description: 'https://example.com/resource.js',
       problemSpan: ProblemSpan.OFFENDER,
       data: {
-        'Encoded Body Size': 31041901,
+        'http.response_content_length': 31041901,
       },
     });
 
@@ -715,6 +715,45 @@ describe('SpanEvidenceKeyValueList', () => {
         screen.getByTestId('span-evidence-key-value-list.duration-impact')
       ).toHaveTextContent('52% (487ms/931ms)');
     });
+
+    describe('With backwards compatible legacy keys', () => {
+      const legacyKeyBuilder = new TransactionEventBuilder(
+        'a1',
+        '/',
+        IssueType.PERFORMANCE_UNCOMPRESSED_ASSET,
+        {
+          duration: 0.931, // in seconds
+        }
+      );
+      legacyKeyBuilder.getEvent().projectID = '123';
+
+      const offenderSpanWithLegacyKey = new MockSpan({
+        startTimestamp: 0,
+        endTimestamp: 0.487, // in seconds
+        op: 'resource.script',
+        description: 'https://example.com/resource.js',
+        problemSpan: ProblemSpan.OFFENDER,
+        data: {
+          'Encoded Body Size': 31041901,
+        },
+      });
+
+      legacyKeyBuilder.addSpan(offenderSpanWithLegacyKey);
+
+      it('Renders relevant fields', () => {
+        render(
+          <SpanEvidenceKeyValueList
+            event={legacyKeyBuilder.getEvent()}
+            projectSlug={projectSlug}
+          />
+        );
+
+        expect(screen.getByRole('cell', {name: 'Asset Size'})).toBeInTheDocument();
+        expect(
+          screen.getByTestId('span-evidence-key-value-list.asset-size')
+        ).toHaveTextContent('29.6 MiB (31041901 B)');
+      });
+    });
   });
 
   describe('Large HTTP Payload', () => {
@@ -732,7 +771,7 @@ describe('SpanEvidenceKeyValueList', () => {
       description: 'https://example.com/api/users',
       problemSpan: ProblemSpan.OFFENDER,
       data: {
-        'Encoded Body Size': 31041901,
+        'http.response_content_length': 31041901,
       },
     });
 
@@ -771,5 +810,40 @@ describe('SpanEvidenceKeyValueList', () => {
         screen.getByTestId('span-evidence-key-value-list.payload-size')
       ).toHaveTextContent('29.6 MiB (31041901 B)');
     });
+
+    describe('With backwards compatible legacy keys', () => {
+      const legacyKeyBuilder = new TransactionEventBuilder(
+        'a1',
+        '/',
+        IssueType.PERFORMANCE_LARGE_HTTP_PAYLOAD
+      );
+      legacyKeyBuilder.getEvent().projectID = '123';
+
+      const offenderSpanWithLegacyKey = new MockSpan({
+        startTimestamp: 0,
+        endTimestamp: 0.487, // in seconds
+        op: 'http.client',
+        description: 'https://example.com/api/users',
+        problemSpan: ProblemSpan.OFFENDER,
+        data: {
+          'Encoded Body Size': 31041901,
+        },
+      });
+
+      legacyKeyBuilder.addSpan(offenderSpanWithLegacyKey);
+      it('Renders relevant fields', () => {
+        render(
+          <SpanEvidenceKeyValueList
+            event={legacyKeyBuilder.getEvent()}
+            projectSlug={projectSlug}
+          />
+        );
+
+        expect(screen.getByRole('cell', {name: 'Payload Size'})).toBeInTheDocument();
+        expect(
+          screen.getByTestId('span-evidence-key-value-list.payload-size')
+        ).toHaveTextContent('29.6 MiB (31041901 B)');
+      });
+    });
   });
 });
diff --git a/static/app/components/events/interfaces/performance/spanEvidenceKeyValueList.tsx b/static/app/components/events/interfaces/performance/spanEvidenceKeyValueList.tsx
index 581fef817e4b21..ed9b9b46a3b115 100644
--- a/static/app/components/events/interfaces/performance/spanEvidenceKeyValueList.tsx
+++ b/static/app/components/events/interfaces/performance/spanEvidenceKeyValueList.tsx
@@ -164,7 +164,8 @@ function LargeHTTPPayloadSpanEvidence({
           makeRow(t('Large HTTP Payload Span'), getSpanEvidenceValue(offendingSpans[0])),
           makeRow(
             t('Payload Size'),
-            getSpanFieldBytes(offendingSpans[0], 'Encoded Body Size')
+            getSpanFieldBytes(offendingSpans[0], 'http.response_content_length') ??
+              getSpanFieldBytes(offendingSpans[0], 'Encoded Body Size')
           ),
         ].filter(Boolean) as KeyValueListData
       }
@@ -311,7 +312,8 @@ function UncompressedAssetSpanEvidence({
         makeRow(t('Slow Resource Span'), getSpanEvidenceValue(offendingSpans[0])),
         makeRow(
           t('Asset Size'),
-          getSpanFieldBytes(offendingSpans[0], 'Encoded Body Size')
+          getSpanFieldBytes(offendingSpans[0], 'http.response_content_length') ??
+            getSpanFieldBytes(offendingSpans[0], 'Encoded Body Size')
         ),
         makeRow(
           t('Duration Impact'),
diff --git a/static/app/components/events/interfaces/spans/spanDetail.tsx b/static/app/components/events/interfaces/spans/spanDetail.tsx
index 6a1a62a026d1e8..5ae0dac1dc8bda 100644
--- a/static/app/components/events/interfaces/spans/spanDetail.tsx
+++ b/static/app/components/events/interfaces/spans/spanDetail.tsx
@@ -61,7 +61,14 @@ import {
 
 const DEFAULT_ERRORS_VISIBLE = 5;
 
-const SIZE_DATA_KEYS = ['Encoded Body Size', 'Decoded Body Size', 'Transfer Size'];
+const SIZE_DATA_KEYS = [
+  'Encoded Body Size',
+  'Decoded Body Size',
+  'Transfer Size',
+  'http.response_content_length',
+  'http.decoded_response_content_length',
+  'http.response_transfer_size',
+];
 
 type TransactionResult = {
   id: string;
diff --git a/static/app/components/events/interfaces/spans/spanTreeModel.spec.tsx b/static/app/components/events/interfaces/spans/spanTreeModel.spec.tsx
index 990a6e7838af7b..64a156536c7401 100644
--- a/static/app/components/events/interfaces/spans/spanTreeModel.spec.tsx
+++ b/static/app/components/events/interfaces/spans/spanTreeModel.spec.tsx
@@ -79,9 +79,9 @@ describe('SpanTreeModel', () => {
             parent_span_id: 'a453cc713e5baf9c',
             trace_id: '8cbbc19c0f54447ab702f00263262726',
             data: {
-              'Decoded Body Size': 159248,
-              'Encoded Body Size': 159248,
-              'Transfer Size': 275,
+              'http.decoded_response_content_length': 159248,
+              'http.response_content_length': 159248,
+              'http.response_transfer_size': 275,
             },
           },
         ],
@@ -298,9 +298,9 @@ describe('SpanTreeModel', () => {
           parent_span_id: 'a453cc713e5baf9c',
           trace_id: '8cbbc19c0f54447ab702f00263262726',
           data: {
-            'Decoded Body Size': 159248,
-            'Encoded Body Size': 159248,
-            'Transfer Size': 275,
+            'http.decoded_response_content_length': 159248,
+            'http.response_content_length': 159248,
+            'http.response_transfer_size': 275,
           },
         },
         numOfSpanChildren: 0,
diff --git a/static/app/components/events/interfaces/spans/waterfallModel.spec.tsx b/static/app/components/events/interfaces/spans/waterfallModel.spec.tsx
index c5da0a70345d3e..ff67d904b18072 100644
--- a/static/app/components/events/interfaces/spans/waterfallModel.spec.tsx
+++ b/static/app/components/events/interfaces/spans/waterfallModel.spec.tsx
@@ -69,9 +69,9 @@ describe('WaterfallModel', () => {
             parent_span_id: 'a453cc713e5baf9c',
             trace_id: '8cbbc19c0f54447ab702f00263262726',
             data: {
-              'Decoded Body Size': 159248,
-              'Encoded Body Size': 159248,
-              'Transfer Size': 275,
+              'http.decoded_response_content_length': 159248,
+              'http.response_content_length': 159248,
+              'http.response_transfer_size': 275,
             },
           },
           {
@@ -83,9 +83,9 @@ describe('WaterfallModel', () => {
             parent_span_id: 'a23f26b939d1a735',
             trace_id: '8cbbc19c0f54447ab702f00263262726',
             data: {
-              'Decoded Body Size': 159248,
-              'Encoded Body Size': 159248,
-              'Transfer Size': 275,
+              'http.decoded_response_content_length': 159248,
+              'http.response_content_length': 159248,
+              'http.response_transfer_size': 275,
             },
           },
           {
@@ -97,9 +97,9 @@ describe('WaterfallModel', () => {
             parent_span_id: 'a0e89ce4e0900ad5',
             trace_id: '8cbbc19c0f54447ab702f00263262726',
             data: {
-              'Decoded Body Size': 159248,
-              'Encoded Body Size': 159248,
-              'Transfer Size': 275,
+              'http.decoded_response_content_length': 159248,
+              'http.response_content_length': 159248,
+              'http.response_transfer_size': 275,
             },
           },
           {
@@ -111,9 +111,9 @@ describe('WaterfallModel', () => {
             parent_span_id: 'a0e89ce4e0900ad5',
             trace_id: '8cbbc19c0f54447ab702f00263262726',
             data: {
-              'Decoded Body Size': 159248,
-              'Encoded Body Size': 159248,
-              'Transfer Size': 275,
+              'http.decoded_response_content_length': 159248,
+              'http.response_content_length': 159248,
+              'http.response_transfer_size': 275,
             },
           },
           {
@@ -125,9 +125,9 @@ describe('WaterfallModel', () => {
             parent_span_id: 'a934857184bdf5a6',
             trace_id: '8cbbc19c0f54447ab702f00263262726',
             data: {
-              'Decoded Body Size': 159248,
-              'Encoded Body Size': 159248,
-              'Transfer Size': 275,
+              'http.decoded_response_content_length': 159248,
+              'http.response_content_length': 159248,
+              'http.response_transfer_size': 275,
             },
           },
           {
@@ -139,9 +139,9 @@ describe('WaterfallModel', () => {
             parent_span_id: 'b5795cf4ba68bbb4',
             trace_id: '8cbbc19c0f54447ab702f00263262726',
             data: {
-              'Decoded Body Size': 159248,
-              'Encoded Body Size': 159248,
-              'Transfer Size': 275,
+              'http.decoded_response_content_length': 159248,
+              'http.response_content_length': 159248,
+              'http.response_transfer_size': 275,
             },
           },
           {
@@ -153,9 +153,9 @@ describe('WaterfallModel', () => {
             parent_span_id: 'b5795cf4ba68bbb5',
             trace_id: '8cbbc19c0f54447ab702f00263262726',
             data: {
-              'Decoded Body Size': 159248,
-              'Encoded Body Size': 159248,
-              'Transfer Size': 275,
+              'http.decoded_response_content_length': 159248,
+              'http.response_content_length': 159248,
+              'http.response_transfer_size': 275,
             },
           },
           {
@@ -167,9 +167,9 @@ describe('WaterfallModel', () => {
             parent_span_id: 'b5795cf4ba68bbb6',
             trace_id: '8cbbc19c0f54447ab702f00263262726',
             data: {
-              'Decoded Body Size': 159248,
-              'Encoded Body Size': 159248,
-              'Transfer Size': 275,
+              'http.decoded_response_content_length': 159248,
+              'http.response_content_length': 159248,
+              'http.response_transfer_size': 275,
             },
           },
         ],
@@ -280,9 +280,9 @@ describe('WaterfallModel', () => {
         parent_span_id: 'a453cc713e5baf9c',
         trace_id: '8cbbc19c0f54447ab702f00263262726',
         data: {
-          'Decoded Body Size': 159248,
-          'Encoded Body Size': 159248,
-          'Transfer Size': 275,
+          'http.decoded_response_content_length': 159248,
+          'http.response_content_length': 159248,
+          'http.response_transfer_size': 275,
         },
       },
       numOfSpanChildren: 1,
@@ -307,9 +307,9 @@ describe('WaterfallModel', () => {
         parent_span_id: 'a23f26b939d1a735',
         trace_id: '8cbbc19c0f54447ab702f00263262726',
         data: {
-          'Decoded Body Size': 159248,
-          'Encoded Body Size': 159248,
-          'Transfer Size': 275,
+          'http.decoded_response_content_length': 159248,
+          'http.response_content_length': 159248,
+          'http.response_transfer_size': 275,
         },
       },
       numOfSpanChildren: 2,
@@ -334,9 +334,9 @@ describe('WaterfallModel', () => {
         parent_span_id: 'a0e89ce4e0900ad5',
         trace_id: '8cbbc19c0f54447ab702f00263262726',
         data: {
-          'Decoded Body Size': 159248,
-          'Encoded Body Size': 159248,
-          'Transfer Size': 275,
+          'http.decoded_response_content_length': 159248,
+          'http.response_content_length': 159248,
+          'http.response_transfer_size': 275,
         },
       },
       numOfSpanChildren: 0,
@@ -361,9 +361,9 @@ describe('WaterfallModel', () => {
         parent_span_id: 'a0e89ce4e0900ad5',
         trace_id: '8cbbc19c0f54447ab702f00263262726',
         data: {
-          'Decoded Body Size': 159248,
-          'Encoded Body Size': 159248,
-          'Transfer Size': 275,
+          'http.decoded_response_content_length': 159248,
+          'http.response_content_length': 159248,
+          'http.response_transfer_size': 275,
         },
       },
       numOfSpanChildren: 0,
@@ -406,9 +406,9 @@ describe('WaterfallModel', () => {
         parent_span_id: 'a934857184bdf5a6',
         trace_id: '8cbbc19c0f54447ab702f00263262726',
         data: {
-          'Decoded Body Size': 159248,
-          'Encoded Body Size': 159248,
-          'Transfer Size': 275,
+          'http.decoded_response_content_length': 159248,
+          'http.response_content_length': 159248,
+          'http.response_transfer_size': 275,
         },
       },
       numOfSpanChildren: 1,
@@ -433,9 +433,9 @@ describe('WaterfallModel', () => {
         parent_span_id: 'b5795cf4ba68bbb6',
         trace_id: '8cbbc19c0f54447ab702f00263262726',
         data: {
-          'Decoded Body Size': 159248,
-          'Encoded Body Size': 159248,
-          'Transfer Size': 275,
+          'http.decoded_response_content_length': 159248,
+          'http.response_content_length': 159248,
+          'http.response_transfer_size': 275,
         },
       },
       treeDepth: 2,
@@ -452,9 +452,9 @@ describe('WaterfallModel', () => {
             parent_span_id: 'b5795cf4ba68bbb4',
             trace_id: '8cbbc19c0f54447ab702f00263262726',
             data: {
-              'Decoded Body Size': 159248,
-              'Encoded Body Size': 159248,
-              'Transfer Size': 275,
+              'http.decoded_response_content_length': 159248,
+              'http.response_content_length': 159248,
+              'http.response_transfer_size': 275,
             },
           },
           numOfSpanChildren: 1,
@@ -479,9 +479,9 @@ describe('WaterfallModel', () => {
             parent_span_id: 'b5795cf4ba68bbb5',
             trace_id: '8cbbc19c0f54447ab702f00263262726',
             data: {
-              'Decoded Body Size': 159248,
-              'Encoded Body Size': 159248,
-              'Transfer Size': 275,
+              'http.decoded_response_content_length': 159248,
+              'http.response_content_length': 159248,
+              'http.response_transfer_size': 275,
             },
           },
           numOfSpanChildren: 1,
@@ -511,9 +511,9 @@ describe('WaterfallModel', () => {
         parent_span_id: 'b5795cf4ba68bbb6',
         trace_id: '8cbbc19c0f54447ab702f00263262726',
         data: {
-          'Decoded Body Size': 159248,
-          'Encoded Body Size': 159248,
-          'Transfer Size': 275,
+          'http.decoded_response_content_length': 159248,
+          'http.response_content_length': 159248,
+          'http.response_transfer_size': 275,
         },
       },
       numOfSpanChildren: 0,
diff --git a/static/app/utils/performanceForSentry.tsx b/static/app/utils/performanceForSentry.tsx
index fe87695b619e04..196f5569015368 100644
--- a/static/app/utils/performanceForSentry.tsx
+++ b/static/app/utils/performanceForSentry.tsx
@@ -225,11 +225,17 @@ const addAssetMeasurements = (transaction: TransactionEvent) => {
         )
     );
     const transfered = filtered.reduce(
-      (acc, curr) => acc + (curr.data['Transfer Size'] ?? 0),
+      (acc, curr) =>
+        acc +
+        (curr.data['http.response_transfer_size'] ?? curr.data['Transfer Size'] ?? 0),
       0
     );
     const encoded = filtered.reduce(
-      (acc, curr) => acc + (curr.data['Encoded Body Size'] ?? 0),
+      (acc, curr) =>
+        acc +
+        (curr.data['http.response_content_length'] ??
+          curr.data['Encoded Body Size'] ??
+          0),
       0
     );