diff --git a/matroska/KaxBlock.h b/matroska/KaxBlock.h
index cebf88a0..65e950b5 100644
--- a/matroska/KaxBlock.h
+++ b/matroska/KaxBlock.h
@@ -184,10 +184,6 @@ class MATROSKA_DLL_API KaxInternalBlock : public libebml::EbmlBinary {
     {}
     KaxInternalBlock(const KaxInternalBlock & ElementToClone);
     ~KaxInternalBlock() override;
-    bool SizeIsValid(std::uint64_t size) const override
-    {
-      return size >= 4; /// for the moment
-    }
     static inline bool SizeIsValid(std::uint64_t size)
     {
       return size >= 4; /// for the moment
diff --git a/matroska/KaxSemantic.h b/matroska/KaxSemantic.h
index 34652cc8..13a49c6f 100644
--- a/matroska/KaxSemantic.h
+++ b/matroska/KaxSemantic.h
@@ -22,7 +22,7 @@
 #include "matroska/KaxDefines.h"
 
 namespace libmatroska {
-DECLARE_MKX_BINARY_LENGTH(KaxSeekID, 4)
+DECLARE_MKX_BINARY(KaxSeekID)
 };
 
 DECLARE_MKX_UINTEGER(KaxSeekPosition)
@@ -31,25 +31,25 @@ DECLARE_MKX_UINTEGER(KaxSeekPosition)
 DECLARE_MKX_MASTER(KaxInfo)
 };
 
-DECLARE_MKX_BINARY_LENGTH(KaxSegmentUID, 16)
+DECLARE_MKX_BINARY(KaxSegmentUID)
 };
 
 DECLARE_MKX_UNISTRING(KaxSegmentFilename)
 };
 
-DECLARE_MKX_BINARY_LENGTH(KaxPrevUID, 16)
+DECLARE_MKX_BINARY(KaxPrevUID)
 };
 
 DECLARE_MKX_UNISTRING(KaxPrevFilename)
 };
 
-DECLARE_MKX_BINARY_LENGTH(KaxNextUID, 16)
+DECLARE_MKX_BINARY(KaxNextUID)
 };
 
 DECLARE_MKX_UNISTRING(KaxNextFilename)
 };
 
-DECLARE_MKX_BINARY_LENGTH(KaxSegmentFamily, 16)
+DECLARE_MKX_BINARY(KaxSegmentFamily)
 };
 
 DECLARE_MKX_MASTER(KaxChapterTranslate)
@@ -386,7 +386,7 @@ DECLARE_MKX_UINTEGER_DEF(KaxVideoAspectRatio)
   libebml::filepos_t RenderData(libebml::IOCallback & output, bool bForceRender, const ShouldWrite & writeFilter) override;
 };
 
-DECLARE_MKX_BINARY_LENGTH(KaxVideoColourSpace, 4)
+DECLARE_MKX_BINARY(KaxVideoColourSpace)
 };
 
 DECLARE_MKX_FLOAT(KaxVideoGamma)
@@ -541,7 +541,7 @@ DECLARE_MKX_UINTEGER(KaxTrickTrackUID)
   libebml::filepos_t RenderData(libebml::IOCallback & output, bool bForceRender, const ShouldWrite & writeFilter) override;
 };
 
-DECLARE_MKX_BINARY_LENGTH(KaxTrickTrackSegmentUID, 16)
+DECLARE_MKX_BINARY(KaxTrickTrackSegmentUID)
 public:
   libebml::filepos_t RenderData(libebml::IOCallback & output, bool bForceRender, const ShouldWrite & writeFilter) override;
 };
@@ -556,7 +556,7 @@ DECLARE_MKX_UINTEGER(KaxTrickMasterTrackUID)
   libebml::filepos_t RenderData(libebml::IOCallback & output, bool bForceRender, const ShouldWrite & writeFilter) override;
 };
 
-DECLARE_MKX_BINARY_LENGTH(KaxTrickMasterTrackSegmentUID, 16)
+DECLARE_MKX_BINARY(KaxTrickMasterTrackSegmentUID)
 public:
   libebml::filepos_t RenderData(libebml::IOCallback & output, bool bForceRender, const ShouldWrite & writeFilter) override;
 };
@@ -743,7 +743,7 @@ DECLARE_MKX_UINTEGER_DEF(KaxChapterFlagHidden)
 DECLARE_MKX_UINTEGER_DEF(KaxChapterFlagEnabled)
 };
 
-DECLARE_MKX_BINARY_LENGTH(KaxChapterSegmentUID, 16)
+DECLARE_MKX_BINARY(KaxChapterSegmentUID)
 };
 
 DECLARE_MKX_UINTEGER(KaxChapterSkipType)