diff --git a/svc/product_series_auto_scheduler.go b/svc/product_series_auto_scheduler.go
index 20f5807..2f6b8e0 100644
--- a/svc/product_series_auto_scheduler.go
+++ b/svc/product_series_auto_scheduler.go
@@ -1236,7 +1236,26 @@ func productSeriesAutoKey(productCode, colorCode, dim3Code string) string {
 }
 
 func normalizeProductSeriesSize(v string) string {
-	return strings.ToUpper(strings.TrimSpace(v))
+	s := strings.ToUpper(strings.TrimSpace(v))
+	// Some installations store series size tokens with a "seriesCode/size" prefix in title/rules
+	// (e.g. "2/48-50-52"). Treat "2/48" as size "48".
+	if i := strings.IndexByte(s, '/'); i > 0 {
+		prefix := strings.TrimSpace(s[:i])
+		suffix := strings.TrimSpace(s[i+1:])
+		if suffix != "" {
+			allDigits := true
+			for _, r := range prefix {
+				if r < '0' || r > '9' {
+					allDigits = false
+					break
+				}
+			}
+			if allDigits {
+				s = suffix
+			}
+		}
+	}
+	return s
 }
 
 func copyProductSeriesStock(in map[string]float64) map[string]float64 {