diff --git a/llvm/test/tools/llvm-nm/XCOFF/size.test b/llvm/test/tools/llvm-nm/XCOFF/size.test
new file mode 100644
--- /dev/null
+++ b/llvm/test/tools/llvm-nm/XCOFF/size.test
@@ -0,0 +1,52 @@
+## Test llvm-nm for XCOFF object files with --print-size option.
+
+# RUN: yaml2obj %s -o %t.o
+# RUN: llvm-nm  --print-size %t.o | FileCheck --match-full-lines %s
+
+--- !XCOFF
+FileHeader:
+  MagicNumber:    0x1DF
+Sections:
+  - Name:         .text
+    Address:      0x0
+    Flags:        [ STYP_TEXT ]
+  - Name:         .data
+    Flags:        [ STYP_DATA ]
+  - Name:         .bss
+    Flags:        [ STYP_BSS ]
+Symbols:
+  - Name:            ._ZL5func0v
+    Section:         .text
+    StorageClass:    C_EXT
+    Type:            0x20
+    AuxEntries:
+     - Type:                   AUX_CSECT
+       SymbolAlignmentAndType: 0x02
+       StorageMappingClass:    XMC_PR
+  - Name:            val
+    Value:           0x200
+    Section:         .data
+    StorageClass:    C_EXT
+    Type:            0x20
+    AuxEntries:
+     - Type:                   AUX_CSECT
+       SymbolAlignmentAndType: 0x01
+       StorageMappingClass:    XMC_RW
+       SectionOrLength:        0x8
+  - Name:            comval
+    Section:         .bss
+    Value:           0x13C
+    StorageClass:    C_EXT
+    Type:            0x00
+    AuxEntries:
+     - Type:                   AUX_CSECT
+       SymbolAlignmentAndType: 0x03
+       StorageMappingClass:    XMC_RW
+       SectionOrLength:        0x4
+
+## Size of a label symbol.
+# CHECK:      00000000 00000000 T ._ZL5func0v
+## Size of a common symbol.
+# CHECK-NEXT: 0000013c 00000004 C comval
+## Size of an SD symbol.
+# CHECK-NEXT: 00000200 00000008 D val
diff --git a/llvm/tools/llvm-nm/llvm-nm.cpp b/llvm/tools/llvm-nm/llvm-nm.cpp
--- a/llvm/tools/llvm-nm/llvm-nm.cpp
+++ b/llvm/tools/llvm-nm/llvm-nm.cpp
@@ -1695,6 +1695,11 @@
       S.Address = 0;
       if (isa<ELFObjectFileBase>(&Obj))
         S.Size = ELFSymbolRef(Sym).getSize();
+
+      if (const XCOFFObjectFile *XCOFFObj =
+              dyn_cast<const XCOFFObjectFile>(&Obj))
+        S.Size = XCOFFObj->getSymbolSize(Sym.getRawDataRefImpl());
+
       if (PrintAddress && isa<ObjectFile>(Obj)) {
         SymbolRef SymRef(Sym);
         Expected<uint64_t> AddressOrErr = SymRef.getAddress();