diff --git a/src/ICSharpCode.SharpZipLib/Tar/TarInputStream.cs b/src/ICSharpCode.SharpZipLib/Tar/TarInputStream.cs
index 2cd646ae9..32982b9f5 100644
--- a/src/ICSharpCode.SharpZipLib/Tar/TarInputStream.cs
+++ b/src/ICSharpCode.SharpZipLib/Tar/TarInputStream.cs
@@ -580,6 +580,7 @@ private async ValueTask<TarEntry> GetNextEntryAsync(CancellationToken ct, bool i
 					this.entrySize = header.Size;
 
 					string longName = null;
+					long longSize = -1;
 
 					if (header.TypeFlag == TarHeader.LF_GNU_LONGNAME)
 					{
@@ -646,6 +647,13 @@ private async ValueTask<TarEntry> GetNextEntryAsync(CancellationToken ct, bool i
 						{
 							longName = name;
 						}
+						if (xhr.Headers.TryGetValue("size", out string size))
+						{
+							if (!long.TryParse(size, out longSize))
+							{
+								longSize = -1;
+							}
+						}
 
 						await SkipToNextEntryAsync(ct, isAsync).ConfigureAwait(false);
 						await this.tarBuffer.ReadBlockIntAsync(headerBuf, ct, isAsync).ConfigureAwait(false);
@@ -676,6 +684,10 @@ private async ValueTask<TarEntry> GetNextEntryAsync(CancellationToken ct, bool i
 						{
 							currentEntry.Name = longName;
 						}
+						if (longSize != -1)
+						{
+							currentEntry.Size = longSize;
+						}
 					}
 					else
 					{
diff --git a/test/ICSharpCode.SharpZipLib.Tests/Tar/TarTests.cs b/test/ICSharpCode.SharpZipLib.Tests/Tar/TarTests.cs
index e49035afa..b36c966b6 100644
--- a/test/ICSharpCode.SharpZipLib.Tests/Tar/TarTests.cs
+++ b/test/ICSharpCode.SharpZipLib.Tests/Tar/TarTests.cs
@@ -296,6 +296,60 @@ public void ExtendedHeaderLongName()
 			Assert.AreEqual(expectedName, entry.Name, "Entry name does not match expected value");
 		}
 
+		[Test]
+		[Category("Tar")]
+		public void PaxFormatLargeSize()
+		{
+			long expectedSize = 10L * 1024 * 1024 * 1024;  // 10 Gigabytes
+
+			// truncated start of 10G tar file
+			var input64 = @"Li9QYXhIZWFkZXJzLzEwRwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
+							AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAADAwMDA2NDQAMDAwMDAw
+							MAAwMDAwMDAwADAwMDAwMDAwMTU1ADE1MDY0MjQ1NzQyADAxMDU2MQAgeAAAAAAAAAAAAAAAAAAA
+							AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
+							AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAB1c3RhcgAwMAAAAAAAAAAAAAAAAAAAAAAAAAAA
+							AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
+							AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
+							AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
+							AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAy
+							MCBzaXplPTEwNzM3NDE4MjQwCjMwIG10aW1lPTE3NTg1NDY5MTQuOTI2ODA4NjAzCjI5IGF0aW1l
+							PTE3NTg1NDY5NDAuNDM2MjU2MjIKMzAgY3RpbWU9MTc1ODU0NjkxNC45MjY4MDg2MDMKAAAAAAAA
+							AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
+							AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
+							AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
+							AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
+							AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
+							AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
+							AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAADEw
+							RwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
+							AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAwMDAwNjQ0ADAwMDE3NTAA
+							MDAwMTc1MAAwMDAwMDAwMDAwMAAxNTA2NDI0NTc0MgAwMDcyMTEAIDAAAAAAAAAAAAAAAAAAAAAA
+							AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
+							AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAdXN0YXIAMDBqdwAAAAAAAAAAAAAAAAAAAAAAAAAA
+							AAAAAAAAAAAAAGp3AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
+							AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
+							AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
+							AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
+							AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
+							AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
+							AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
+							AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
+							AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
+							AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
+							AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
+							AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
+							AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=
+";
+
+			var buffer = Convert.FromBase64String(input64);
+			using var ms = new MemoryStream(buffer);
+			using var tis = new TarInputStream (ms, nameEncoding: null);
+			var entry = tis.GetNextEntry();
+
+			Assert.IsNotNull(entry, "Entry is null");
+			Assert.AreEqual(expectedSize, entry.Size, "Entry size does not match expected value");
+		}
+
 		/// <summary>
 		/// Test equals function for tar headers.
 		/// </summary>