diff --git a/lib/format_normalization.py b/lib/format_normalization.py
index a115097..08165a9 100644
--- a/lib/format_normalization.py
+++ b/lib/format_normalization.py
@@ -17,9 +17,12 @@
 
 import re
 
-# Quantity prefix pattern: "2x", "3x", etc.
+# Quantity prefix pattern: "2x", "3x", etc. (Discogs format strings)
 _QUANTITY_RE = re.compile(r"^\d+x", re.IGNORECASE)
 
+# Quantity suffix pattern: " x 2", " x 3 box", etc. (WXYC library format strings)
+_LIB_QUANTITY_SUFFIX_RE = re.compile(r"\s+x\s+\d+(\s+box)?$", re.IGNORECASE)
+
 # Mapping from lowercase format string to category.
 _FORMAT_MAP: dict[str, str] = {
     "vinyl": "Vinyl",
@@ -82,7 +85,18 @@ def normalize_library_format(raw: str | None) -> str | None:
     if not fmt:
         return None
 
-    return _FORMAT_MAP.get(fmt.lower())
+    # Strip quantity suffix: " x 2", " x 3 box", etc.
+    fmt = _LIB_QUANTITY_SUFFIX_RE.sub("", fmt)
+    lowered = fmt.lower()
+
+    # Handle "vinyl - SIZE" compound format
+    if lowered.startswith("vinyl - "):
+        size = fmt[len("vinyl - ") :].strip()
+        if size:
+            return _FORMAT_MAP.get(size.lower(), "Vinyl")
+        return "Vinyl"
+
+    return _FORMAT_MAP.get(lowered)
 
 
 def format_matches(release_format: str | None, library_formats: set[str | None]) -> bool:
diff --git a/tests/unit/test_format_normalization.py b/tests/unit/test_format_normalization.py
index 7e5f8dd..43b52e2 100644
--- a/tests/unit/test_format_normalization.py
+++ b/tests/unit/test_format_normalization.py
@@ -121,8 +121,43 @@ class TestNormalizeLibraryFormat:
             ("Vinyl", "Vinyl"),
             (None, None),
             ("", None),
+            # Quantity suffix
+            ("cd x 2", "CD"),
+            ("cd x 3", "CD"),
+            ("cd x 4", "CD"),
+            ("cd x 2 box", "CD"),
+            # Vinyl with size
+            ('vinyl - 12"', "Vinyl"),
+            ('vinyl - 7"', '7"'),
+            ("vinyl - LP", "Vinyl"),
+            ('vinyl - 10"', "Vinyl"),
+            # Vinyl with size + quantity
+            ("vinyl - LP x 2", "Vinyl"),
+            ('vinyl - 7" x 2', '7"'),
+            ('vinyl - 12" x 2', "Vinyl"),
+            ('vinyl - 10" x 2', "Vinyl"),
+        ],
+        ids=[
+            "lp",
+            "cd",
+            "cassette",
+            "7_inch",
+            "vinyl",
+            "none",
+            "empty",
+            "cd_x_2",
+            "cd_x_3",
+            "cd_x_4",
+            "cd_x_2_box",
+            "vinyl_12_inch",
+            "vinyl_7_inch",
+            "vinyl_lp",
+            "vinyl_10_inch",
+            "vinyl_lp_x_2",
+            "vinyl_7_inch_x_2",
+            "vinyl_12_inch_x_2",
+            "vinyl_10_inch_x_2",
         ],
-        ids=["lp", "cd", "cassette", "7_inch", "vinyl", "none", "empty"],
     )
     def test_normalize_library_format(self, raw, expected):
         assert normalize_library_format(raw) == expected