diff --git a/pkg/harvester/edit/kubevirt.io.virtualmachine/VirtualMachineVolume/type/vmImage.vue b/pkg/harvester/edit/kubevirt.io.virtualmachine/VirtualMachineVolume/type/vmImage.vue
index be545945fcf..68b46bb2881 100644
--- a/pkg/harvester/edit/kubevirt.io.virtualmachine/VirtualMachineVolume/type/vmImage.vue
+++ b/pkg/harvester/edit/kubevirt.io.virtualmachine/VirtualMachineVolume/type/vmImage.vue
@@ -140,8 +140,10 @@ export default {
 
     onImageChange() {
       const imageResource = this.$store.getters['harvester/all'](HCI.IMAGE)?.find( I => this.value.image === I.id);
+      const isIsoImage = /iso$/i.test(imageResource?.imageSuffix);
+      const imageSize = Math.max(imageResource?.status?.size, imageResource?.status?.virtualSize);
 
-      if (/iso$/i.test(imageResource?.imageSuffix)) {
+      if (isIsoImage) {
         this.$set(this.value, 'type', 'cd-rom');
         this.$set(this.value, 'bus', 'sata');
       } else {
@@ -149,6 +151,15 @@ export default {
         this.$set(this.value, 'bus', 'virtio');
       }
 
+      if (imageSize) {
+        let imageSizeGiB = Math.ceil(imageSize / 1024 / 1024 / 1024);
+
+        if (!isIsoImage) {
+          imageSizeGiB = Math.max(imageSizeGiB, 10);
+        }
+        this.$set(this.value, 'size', `${ imageSizeGiB }Gi`);
+      }
+
       this.update();
     },
 
diff --git a/pkg/harvester/mixins/harvester-vm/index.js b/pkg/harvester/mixins/harvester-vm/index.js
index 380ca00d767..17f0b729c6c 100644
--- a/pkg/harvester/mixins/harvester-vm/index.js
+++ b/pkg/harvester/mixins/harvester-vm/index.js
@@ -414,14 +414,26 @@ export default {
       if (_disks.length === 0) {
         let bus = 'virtio';
         let type = HARD_DISK;
+        let size = '10Gi';
 
         const imageResource = this.images.find( I => this.imageId === I.id);
+        const isIsoImage = /iso$/i.test(imageResource?.imageSuffix);
+        const imageSize = Math.max(imageResource?.status?.size, imageResource?.status?.virtualSize);
 
-        if (/iso$/i.test(imageResource?.imageSuffix)) {
+        if (isIsoImage) {
           bus = 'sata';
           type = CD_ROM;
         }
 
+        if (imageSize) {
+          let imageSizeGiB = Math.ceil(imageSize / 1024 / 1024 / 1024);
+
+          if (!isIsoImage) {
+            imageSizeGiB = Math.max(imageSizeGiB, 10);
+          }
+          size = `${ imageSizeGiB }Gi`;
+        }
+
         out.push({
           id:               randomStr(5),
           source:           SOURCE_TYPE.IMAGE,
@@ -429,7 +441,7 @@ export default {
           accessMode:       'ReadWriteMany',
           bus,
           volumeName:       '',
-          size:             '10Gi',
+          size,
           type,
           storageClassName: '',
           image:            this.imageId,