diff --git a/pkg/providers/instancetype/instancetype.go b/pkg/providers/instancetype/instancetype.go
index 3f1a157aeac4..dd1a63a275c4 100644
--- a/pkg/providers/instancetype/instancetype.go
+++ b/pkg/providers/instancetype/instancetype.go
@@ -113,7 +113,11 @@ func (p *Provider) List(ctx context.Context, kc *corev1beta1.KubeletConfiguratio
 	subnetHash, _ := hashstructure.Hash(subnets, hashstructure.FormatV2, &hashstructure.HashOptions{SlicesAsSets: true})
 	kcHash, _ := hashstructure.Hash(kc, hashstructure.FormatV2, &hashstructure.HashOptions{SlicesAsSets: true})
 	blockDeviceMappingsHash, _ := hashstructure.Hash(nodeClass.Spec.BlockDeviceMappings, hashstructure.FormatV2, &hashstructure.HashOptions{SlicesAsSets: true})
-	key := fmt.Sprintf("%d-%d-%d-%016x-%016x-%016x-%s-%s", p.instanceTypesSeqNum, p.instanceTypeOfferingsSeqNum, p.unavailableOfferings.SeqNum, subnetHash, kcHash, blockDeviceMappingsHash, aws.StringValue((*string)(nodeClass.Spec.InstanceStorePolicy)), aws.StringValue(nodeClass.Spec.AMIFamily))
+	VolumeSizeStringCollection := lo.Reduce(nodeClass.Spec.BlockDeviceMappings, func(agg string, block *v1beta1.BlockDeviceMapping, _ int) string {
+		return fmt.Sprintf("%s/%s", agg, block.EBS.VolumeSize)
+	}, "")
+	volumeSizeHash, _ := hashstructure.Hash(VolumeSizeStringCollection, hashstructure.FormatV2, &hashstructure.HashOptions{SlicesAsSets: true})
+	key := fmt.Sprintf("%d-%d-%d-%016x-%016x-%016x-%s-%s-%016x", p.instanceTypesSeqNum, p.instanceTypeOfferingsSeqNum, p.unavailableOfferings.SeqNum, subnetHash, kcHash, blockDeviceMappingsHash, aws.StringValue((*string)(nodeClass.Spec.InstanceStorePolicy)), aws.StringValue(nodeClass.Spec.AMIFamily), volumeSizeHash)
 	if item, ok := p.cache.Get(key); ok {
 		return item.([]*cloudprovider.InstanceType), nil
 	}