diff --git a/plugins/inputs/vsphere/README.md b/plugins/inputs/vsphere/README.md
index c7d438a9c9285..cff9df965dd69 100644
--- a/plugins/inputs/vsphere/README.md
+++ b/plugins/inputs/vsphere/README.md
@@ -566,6 +566,7 @@ For a detailed list of commonly available metrics, please refer to
   * esxhost (name of ESXi host)
   * guest (guest operating system id)
   * resource pool (name of resource pool)
+  * memorySizeMB (configured RAM in MB)
 * cpu stats for Host and VM
   * cpu (cpu core - not all CPU fields will have this tag)
 * datastore stats for Host and VM
diff --git a/plugins/inputs/vsphere/endpoint.go b/plugins/inputs/vsphere/endpoint.go
index 4694fc9d933d6..41a44008eade0 100644
--- a/plugins/inputs/vsphere/endpoint.go
+++ b/plugins/inputs/vsphere/endpoint.go
@@ -100,6 +100,7 @@ type objectRef struct {
 	ref          types.ManagedObjectReference
 	parentRef    *types.ManagedObjectReference //Pointer because it must be nillable
 	guest        string
+	memorySizeMB int32
 	dcname       string
 	rpname       string
 	customValues map[string]string
@@ -845,6 +846,7 @@ func getVMs(ctx context.Context, e *Endpoint, resourceFilter *ResourceFilter) (o
 			}
 			uuid = r.Config.Uuid
 		}
+
 		cvs := make(map[string]string)
 		if e.customAttrEnabled {
 			for _, cv := range r.Summary.CustomValue {
@@ -867,6 +869,7 @@ func getVMs(ctx context.Context, e *Endpoint, resourceFilter *ResourceFilter) (o
 			ref:          r.ExtensibleManagedObject.Reference(),
 			parentRef:    r.Runtime.Host,
 			guest:        guest,
+			memorySizeMB: r.Summary.Config.MemorySizeMB,
 			altID:        uuid,
 			rpname:       rpname,
 			customValues: e.loadCustomAttributes(r.ManagedEntity),
@@ -1338,6 +1341,9 @@ func (e *Endpoint) populateTags(objectRef *objectRef, resourceType string, resou
 	if resourceType == "vm" && objectRef.rpname != "" {
 		t["rpname"] = objectRef.rpname
 	}
+	if resourceType == "vm" && objectRef.memorySizeMB != 0 {
+		t["memorySizeMB"] = strconv.Itoa(int(objectRef.memorySizeMB))
+	}
 
 	// Map parent reference
 	parent, found := e.getParent(objectRef, resource)
diff --git a/plugins/inputs/vsphere/finder.go b/plugins/inputs/vsphere/finder.go
index 9b9254205d199..8d58653c1c1d7 100644
--- a/plugins/inputs/vsphere/finder.go
+++ b/plugins/inputs/vsphere/finder.go
@@ -258,8 +258,8 @@ func init() {
 		"HostSystem":   {"parent", "summary.customValue", "customValue"},
 		"ResourcePool": {"parent", "customValue"},
 		"VirtualMachine": {"runtime.host", "config.guestId", "config.uuid", "runtime.powerState",
-			"summary.customValue", "guest.guestId", "guest.net", "guest.hostName", "resourcePool",
-			"customValue"},
+			"summary.customValue", "summary.config.memorySizeMB", "guest.guestId", "guest.net", "guest.hostName",
+			"resourcePool", "customValue"},
 		"Datastore":              {"parent", "info", "customValue"},
 		"ClusterComputeResource": {"parent", "customValue"},
 		"Datacenter":             {"parent", "customValue"},