diff --git a/frontend/src/__mocks__/mockPVCK8sResource.ts b/frontend/src/__mocks__/mockPVCK8sResource.ts
index aeb905b018..9092688c36 100644
--- a/frontend/src/__mocks__/mockPVCK8sResource.ts
+++ b/frontend/src/__mocks__/mockPVCK8sResource.ts
@@ -8,6 +8,7 @@ type MockResourceConfigType = {
   storageClassName?: string;
   displayName?: string;
   uid?: string;
+  status?: PersistentVolumeClaimKind['status'];
 };
 
 export const mockPVCK8sResource = ({
@@ -17,6 +18,13 @@ export const mockPVCK8sResource = ({
   storageClassName = 'gp3',
   displayName = 'Test Storage',
   uid = genUID('pvc'),
+  status = {
+    phase: 'Bound',
+    accessModes: ['ReadWriteOnce'],
+    capacity: {
+      storage,
+    },
+  },
 }: MockResourceConfigType): PersistentVolumeClaimKind => ({
   kind: 'PersistentVolumeClaim',
   apiVersion: 'v1',
@@ -43,11 +51,5 @@ export const mockPVCK8sResource = ({
     storageClassName,
     volumeMode: 'Filesystem',
   },
-  status: {
-    phase: 'Bound',
-    accessModes: ['ReadWriteOnce'],
-    capacity: {
-      storage,
-    },
-  },
+  status,
 });
diff --git a/frontend/src/__tests__/cypress/cypress/pages/clusterStorage.ts b/frontend/src/__tests__/cypress/cypress/pages/clusterStorage.ts
index a8bbdcfa9c..9e8139e7ab 100644
--- a/frontend/src/__tests__/cypress/cypress/pages/clusterStorage.ts
+++ b/frontend/src/__tests__/cypress/cypress/pages/clusterStorage.ts
@@ -84,7 +84,7 @@ class ClusterStorageModal extends Modal {
 
   shouldHavePVSizeSelectValue(name: string) {
     this.findPVSizeSelectButton().contains(name).should('exist');
-    return this;
+    return this.findPVSizeSelectButton();
   }
 
   private findPVSizeField() {
@@ -95,8 +95,12 @@ class ClusterStorageModal extends Modal {
     return this.findPVSizeField().findByRole('button', { name: 'Minus' });
   }
 
-  findPersistentStorageWarning() {
-    return this.find().findByTestId('persistent-storage-warning');
+  findPersistentStorageWarningCanNotEdit() {
+    return this.find().findByTestId('persistent-storage-warning-can-not-edit');
+  }
+
+  findPersistentStorageWarningCanOnlyIncrease() {
+    return this.find().findByTestId('persistent-storage-warning-can-only-increase');
   }
 
   findPVSizeInput() {
diff --git a/frontend/src/__tests__/cypress/cypress/tests/mocked/projects/clusterStorage.cy.ts b/frontend/src/__tests__/cypress/cypress/tests/mocked/projects/clusterStorage.cy.ts
index af794ec5ff..df0b2e7031 100644
--- a/frontend/src/__tests__/cypress/cypress/tests/mocked/projects/clusterStorage.cy.ts
+++ b/frontend/src/__tests__/cypress/cypress/tests/mocked/projects/clusterStorage.cy.ts
@@ -51,6 +51,11 @@ const initInterceptors = ({ isEmpty = false, storageClassName }: HandlersProps)
         : [
             mockPVCK8sResource({ uid: 'test-id', storageClassName }),
             mockPVCK8sResource({ displayName: 'Another Cluster Storage', storageClassName }),
+            mockPVCK8sResource({
+              displayName: 'Unbound storage',
+              storageClassName,
+              status: { phase: 'Pending' },
+            }),
           ],
     ),
   );
@@ -412,7 +417,7 @@ describe('ClusterStorage', () => {
     updateClusterStorageModal.findNameInput().should('have.value', 'Test Storage');
     updateClusterStorageModal.findPVSizeInput().should('have.value', '5');
     updateClusterStorageModal.shouldHavePVSizeSelectValue('GiB');
-    updateClusterStorageModal.findPersistentStorageWarning().should('exist');
+    updateClusterStorageModal.findPersistentStorageWarningCanOnlyIncrease().should('exist');
     updateClusterStorageModal.findSubmitButton().should('be.enabled');
     updateClusterStorageModal.findNameInput().fill('test-updated');
 
@@ -446,6 +451,17 @@ describe('ClusterStorage', () => {
     });
   });
 
+  it('should disable size field when editing unbound storage', () => {
+    initInterceptors({});
+    clusterStorage.visit('test-project');
+    const clusterStorageRow = clusterStorage.getClusterStorageRow('Unbound storage');
+    clusterStorageRow.findKebabAction('Edit storage').click();
+    updateClusterStorageModal.findNameInput().should('have.value', 'Unbound storage');
+    updateClusterStorageModal.findPVSizeInput().should('have.value', '5').should('be.disabled');
+    updateClusterStorageModal.shouldHavePVSizeSelectValue('GiB').should('be.disabled');
+    updateClusterStorageModal.findPersistentStorageWarningCanNotEdit().should('exist');
+  });
+
   it('Delete cluster storage', () => {
     initInterceptors({});
     clusterStorage.visit('test-project');
diff --git a/frontend/src/components/ValueUnitField.tsx b/frontend/src/components/ValueUnitField.tsx
index fb7e783b0d..c19645fe4f 100644
--- a/frontend/src/components/ValueUnitField.tsx
+++ b/frontend/src/components/ValueUnitField.tsx
@@ -30,6 +30,7 @@ type ValueUnitFieldProps = {
   value: ValueUnitString;
   validated?: 'default' | 'error' | 'warning' | 'success' | ValidatedOptions | undefined;
   menuAppendTo?: HTMLElement;
+  isDisabled?: boolean;
 };
 
 const ValueUnitField: React.FC<ValueUnitFieldProps> = ({
@@ -41,6 +42,7 @@ const ValueUnitField: React.FC<ValueUnitFieldProps> = ({
   menuAppendTo,
   value: fullValue,
   validated,
+  isDisabled,
 }) => {
   const [open, setOpen] = React.useState(false);
   const [currentValue, currentUnitOption] = splitValueUnit(fullValue, options);
@@ -64,6 +66,7 @@ const ValueUnitField: React.FC<ValueUnitFieldProps> = ({
           onChange={(value) => {
             onChange(`${value || minAsNumber}${currentUnitOption.unit}`);
           }}
+          isDisabled={isDisabled}
         />
       </SplitItem>
       <SplitItem>
@@ -80,6 +83,7 @@ const ValueUnitField: React.FC<ValueUnitFieldProps> = ({
                 setOpen(!open);
               }}
               isExpanded={open}
+              isDisabled={isDisabled}
             >
               {currentUnitOption.name}
             </MenuToggle>
diff --git a/frontend/src/pages/projects/components/PVSizeField.tsx b/frontend/src/pages/projects/components/PVSizeField.tsx
index 34c348fb2b..62ca708697 100644
--- a/frontend/src/pages/projects/components/PVSizeField.tsx
+++ b/frontend/src/pages/projects/components/PVSizeField.tsx
@@ -3,13 +3,14 @@ import { FormGroup, FormHelperText, HelperText, HelperTextItem } from '@patternf
 import { ExclamationTriangleIcon } from '@patternfly/react-icons';
 import ValueUnitField from '~/components/ValueUnitField';
 import { MEMORY_UNITS_FOR_SELECTION, UnitOption } from '~/utilities/valueUnits';
+import { PersistentVolumeClaimKind } from '~/k8sTypes';
 
 type PVSizeFieldProps = {
   fieldID: string;
   size: string;
   menuAppendTo?: HTMLElement;
   setSize: (size: string) => void;
-  currentSize?: string;
+  currentStatus?: PersistentVolumeClaimKind['status'];
   label?: string;
   options?: UnitOption[];
 };
@@ -19,35 +20,55 @@ const PVSizeField: React.FC<PVSizeFieldProps> = ({
   size,
   menuAppendTo,
   setSize,
-  currentSize,
+  currentStatus,
   label = 'Persistent storage size',
   options = MEMORY_UNITS_FOR_SELECTION,
-}) => (
-  <FormGroup label={label} fieldId={fieldID} data-testid={fieldID}>
-    <ValueUnitField
-      min={currentSize ?? 1}
-      onBlur={(value) => setSize(value)}
-      menuAppendTo={menuAppendTo}
-      onChange={(value) => setSize(value)}
-      validated={currentSize ? 'warning' : 'default'}
-      options={options}
-      value={size}
-    />
-    {currentSize && (
-      <FormHelperText>
-        <HelperText>
-          <HelperTextItem
-            data-testid="persistent-storage-warning"
-            variant="warning"
-            icon={<ExclamationTriangleIcon />}
-          >
-            Storage size can only be increased. If you do so, the workbench will restart and be
-            unavailable for a period of time that is usually proportional to the size change.
-          </HelperTextItem>
-        </HelperText>
-      </FormHelperText>
-    )}
-  </FormGroup>
-);
+}) => {
+  const currentSize = currentStatus?.capacity?.storage;
+  const isUnbound = currentStatus && currentStatus.phase !== 'Bound';
+
+  return (
+    <FormGroup label={label} fieldId={fieldID} data-testid={fieldID}>
+      <ValueUnitField
+        min={currentSize ?? 1}
+        onBlur={(value) => setSize(value)}
+        menuAppendTo={menuAppendTo}
+        onChange={(value) => setSize(value)}
+        validated={currentSize ? 'warning' : 'default'}
+        options={options}
+        value={size}
+        isDisabled={isUnbound}
+      />
+
+      {(currentSize || isUnbound) && (
+        <FormHelperText>
+          <HelperText>
+            {isUnbound && (
+              <HelperTextItem
+                data-testid="persistent-storage-warning-can-not-edit"
+                variant="warning"
+                icon={<ExclamationTriangleIcon />}
+              >
+                To edit the size, you must first attach this cluster storage to a workbench, then
+                start the workbench. If the workbench is already running, it will restart
+                automatically.
+              </HelperTextItem>
+            )}
+            {currentSize && (
+              <HelperTextItem
+                data-testid="persistent-storage-warning-can-only-increase"
+                variant="warning"
+                icon={<ExclamationTriangleIcon />}
+              >
+                Storage size can only be increased. If you do so, the workbench will restart and be
+                unavailable for a period of time that is usually proportional to the size change.
+              </HelperTextItem>
+            )}
+          </HelperText>
+        </FormHelperText>
+      )}
+    </FormGroup>
+  );
+};
 
 export default PVSizeField;
diff --git a/frontend/src/pages/projects/screens/detail/storage/BaseStorageModal.tsx b/frontend/src/pages/projects/screens/detail/storage/BaseStorageModal.tsx
index ffa5ca397a..e3fb46026f 100644
--- a/frontend/src/pages/projects/screens/detail/storage/BaseStorageModal.tsx
+++ b/frontend/src/pages/projects/screens/detail/storage/BaseStorageModal.tsx
@@ -103,7 +103,7 @@ const BaseStorageModal: React.FC<BaseStorageModalProps> = ({
             <CreateNewStorageSection
               data={createData}
               setData={setCreateData}
-              currentSize={existingData?.status?.capacity?.storage}
+              currentStatus={existingData?.status}
               autoFocusName
               disableStorageClassSelect={!!existingData}
             />
diff --git a/frontend/src/pages/projects/screens/detail/storage/ManageStorageModal.tsx b/frontend/src/pages/projects/screens/detail/storage/ManageStorageModal.tsx
index c0f8475dd2..cd57ea5533 100644
--- a/frontend/src/pages/projects/screens/detail/storage/ManageStorageModal.tsx
+++ b/frontend/src/pages/projects/screens/detail/storage/ManageStorageModal.tsx
@@ -173,7 +173,7 @@ const ManageStorageModal: React.FC<AddStorageModalProps> = ({ existingData, onCl
             <CreateNewStorageSection
               data={createData}
               setData={setCreateData}
-              currentSize={existingData?.status?.capacity?.storage}
+              currentStatus={existingData?.status}
               autoFocusName
               disableStorageClassSelect={!!existingData}
             />
diff --git a/frontend/src/pages/projects/screens/spawner/storage/CreateNewStorageSection.tsx b/frontend/src/pages/projects/screens/spawner/storage/CreateNewStorageSection.tsx
index ca59d342be..fdab0cab31 100644
--- a/frontend/src/pages/projects/screens/spawner/storage/CreateNewStorageSection.tsx
+++ b/frontend/src/pages/projects/screens/spawner/storage/CreateNewStorageSection.tsx
@@ -4,12 +4,13 @@ import { CreatingStorageObject, UpdateObjectAtPropAndValue } from '~/pages/proje
 import PVSizeField from '~/pages/projects/components/PVSizeField';
 import NameDescriptionField from '~/concepts/k8s/NameDescriptionField';
 import { SupportedArea, useIsAreaAvailable } from '~/concepts/areas';
+import { PersistentVolumeClaimKind } from '~/k8sTypes';
 import StorageClassSelect from './StorageClassSelect';
 
 type CreateNewStorageSectionProps<D extends CreatingStorageObject> = {
   data: D;
   setData: UpdateObjectAtPropAndValue<D>;
-  currentSize?: string;
+  currentStatus?: PersistentVolumeClaimKind['status'];
   autoFocusName?: boolean;
   menuAppendTo?: HTMLElement;
   disableStorageClassSelect?: boolean;
@@ -18,7 +19,7 @@ type CreateNewStorageSectionProps<D extends CreatingStorageObject> = {
 const CreateNewStorageSection = <D extends CreatingStorageObject>({
   data,
   setData,
-  currentSize,
+  currentStatus,
   menuAppendTo,
   autoFocusName,
   disableStorageClassSelect,
@@ -50,7 +51,7 @@ const CreateNewStorageSection = <D extends CreatingStorageObject>({
         <PVSizeField
           menuAppendTo={menuAppendTo}
           fieldID="create-new-storage-size"
-          currentSize={currentSize}
+          currentStatus={currentStatus}
           size={data.size}
           setSize={(size) => setData('size', size)}
         />