diff --git a/src/main/java/me/indian/bds/watchdog/module/BackupModule.java b/src/main/java/me/indian/bds/watchdog/module/BackupModule.java
index aaf6ec6d..1f0e6e1e 100644
--- a/src/main/java/me/indian/bds/watchdog/module/BackupModule.java
+++ b/src/main/java/me/indian/bds/watchdog/module/BackupModule.java
@@ -1,6 +1,7 @@
 package me.indian.bds.watchdog.module;
 
 import java.io.File;
+import java.io.IOException;
 import java.nio.file.DirectoryStream;
 import java.nio.file.Files;
 import java.nio.file.Path;
@@ -135,7 +136,10 @@ public void backup() {
                 ZipUtil.zipFolder(this.worldPath, backup.getPath());
                 final double backUpTime = ((System.currentTimeMillis() - startTime) / 1000.0);
                 this.watchDogConfig.getBackupConfig().setLastBackupTime(backUpTime);
-                this.serverProcess.tellrawToAllAndLogger(this.prefix, "&aUtworzono kopię zapasową w&b " + backUpTime + "&a sekund", LogState.INFO);
+                this.serverProcess.tellrawToAllAndLogger(this.prefix,
+                        "&aUtworzono kopię zapasową w&b " + backUpTime + "&a sekund, waży ona " + this.getBackupSize(backup),
+                        LogState.INFO);
+
                 this.discord.sendBackupDoneMessage();
                 this.status = "Utworzono backup";
                 this.loadAvailableBackups();
@@ -236,6 +240,19 @@ private void createWorldFile() {
         }
     }
 
+    private String getBackupSize(final File backup) {
+        long fileSizeBytes;
+        try {
+            fileSizeBytes = Files.size(backup.toPath());
+        } catch (final IOException exception) {
+            fileSizeBytes = -1;
+        }
+        final long gb = MathUtil.bytesToGB(fileSizeBytes);
+        final long mb = MathUtil.getMbFromBytesGb(fileSizeBytes);
+        final long kb = MathUtil.getKbFromBytesGb(fileSizeBytes);
+        return "&b" + gb + "&e GB &b" + mb + "&e MB &b" + kb + "&e KB";
+    }
+
     public long calculateMillisUntilNextBackup() {
         return Math.max(0, MathUtil.minutesToMillis(this.watchDogConfig.getBackupConfig().getBackupFrequency()) - (System.currentTimeMillis() - this.lastBackupMillis));
     }