diff --git a/SabreTools.Metadata.DatFiles/Formats/ClrMamePro.cs b/SabreTools.Metadata.DatFiles/Formats/ClrMamePro.cs
index 6c1f85f5..e1a30c6c 100644
--- a/SabreTools.Metadata.DatFiles/Formats/ClrMamePro.cs
+++ b/SabreTools.Metadata.DatFiles/Formats/ClrMamePro.cs
@@ -88,7 +88,7 @@ namespace SabreTools.Metadata.DatFiles.Formats
                 case Rom rom:
                     if (string.IsNullOrEmpty(rom.Name))
                         missingFields.Add(nameof(Data.Models.Metadata.Rom.Name));
-                    if (rom.Size is null || rom.Size < 0)
+                    if ((rom.Size is null || rom.Size < 0) && rom.SHA1 is null && rom.SHA256 is null)
                         missingFields.Add(nameof(Data.Models.Metadata.Rom.Size));
                     if (string.IsNullOrEmpty(rom.BLAKE3)
                         && string.IsNullOrEmpty(rom.CRC16)
diff --git a/SabreTools.Metadata.DatFiles/Formats/Logiqx.cs b/SabreTools.Metadata.DatFiles/Formats/Logiqx.cs
index 291cfd37..d0dc74f2 100644
--- a/SabreTools.Metadata.DatFiles/Formats/Logiqx.cs
+++ b/SabreTools.Metadata.DatFiles/Formats/Logiqx.cs
@@ -282,7 +282,7 @@ namespace SabreTools.Metadata.DatFiles.Formats
                 case Rom rom:
                     if (string.IsNullOrEmpty(rom.Name))
                         missingFields.Add(nameof(Data.Models.Metadata.Rom.Name));
-                    if (rom.Size is null || rom.Size < 0)
+                    if ((rom.Size is null || rom.Size < 0) && rom.SHA1 is null && rom.SHA256 is null)
                         missingFields.Add(nameof(Data.Models.Metadata.Rom.Size));
                     if (string.IsNullOrEmpty(rom.BLAKE3)
                         && string.IsNullOrEmpty(rom.CRC16)
diff --git a/SabreTools.Metadata.DatFiles/Formats/SeparatedValue.cs b/SabreTools.Metadata.DatFiles/Formats/SeparatedValue.cs
index 60dcb468..14c89929 100644
--- a/SabreTools.Metadata.DatFiles/Formats/SeparatedValue.cs
+++ b/SabreTools.Metadata.DatFiles/Formats/SeparatedValue.cs
@@ -93,7 +93,7 @@ namespace SabreTools.Metadata.DatFiles.Formats
                 case Rom rom:
                     if (string.IsNullOrEmpty(rom.Name))
                         missingFields.Add(nameof(Data.Models.Metadata.Rom.Name));
-                    if (rom.Size is null || rom.Size < 0)
+                    if ((rom.Size is null || rom.Size < 0) && rom.SHA1 is null && rom.SHA256 is null)
                         missingFields.Add(nameof(Data.Models.Metadata.Rom.Size));
                     if (string.IsNullOrEmpty(rom.CRC32)
                         && string.IsNullOrEmpty(rom.MD5)