diff --git a/python/core/auto_generated/pointcloud/qgspointcloudattribute.sip.in b/python/core/auto_generated/pointcloud/qgspointcloudattribute.sip.in
index 5ec12c6364e7..fefef2f516f9 100644
--- a/python/core/auto_generated/pointcloud/qgspointcloudattribute.sip.in
+++ b/python/core/auto_generated/pointcloud/qgspointcloudattribute.sip.in
@@ -46,7 +46,7 @@ Ctor
 Returns name of the attribute
 %End
 
-    size_t size() const;
+    int size() const;
 %Docstring
 Returns size of the attribute in bytes
 %End
@@ -133,7 +133,7 @@ Returns the index of the attribute with the specified ``name``.
 Returns -1 if a matching attribute was not found.
 %End
 
-    size_t pointRecordSize() const;
+    int pointRecordSize() const;
 %Docstring
 Returns total size of record
 %End
diff --git a/src/core/pointcloud/qgspointcloudattribute.h b/src/core/pointcloud/qgspointcloudattribute.h
index f39f27137e22..6e720ede9609 100644
--- a/src/core/pointcloud/qgspointcloudattribute.h
+++ b/src/core/pointcloud/qgspointcloudattribute.h
@@ -53,7 +53,7 @@ class CORE_EXPORT QgsPointCloudAttribute
     QString name() const { return mName; }
 
     //! Returns size of the attribute in bytes
-    size_t size() const { return mSize; }
+    int size() const { return mSize; }
 
     //! Returns the data type
     DataType type() const { return mType; }
@@ -84,7 +84,7 @@ class CORE_EXPORT QgsPointCloudAttribute
     void updateSize();
 
     QString mName;
-    size_t mSize = 0;
+    int mSize = 0;
     DataType mType;
 };
 
@@ -133,17 +133,17 @@ class CORE_EXPORT QgsPointCloudAttributeCollection
     int indexOf( const QString &name ) const;
 
     //! Returns total size of record
-    size_t pointRecordSize() const { return mSize; }
+    int pointRecordSize() const { return mSize; }
 
   private:
-    std::size_t mSize = 0;
+    int mSize = 0;
     QVector<QgsPointCloudAttribute> mAttributes;
 
     struct CachedAttributeData
     {
       int index;
-      std::size_t offset;
-      CachedAttributeData( int index, std::size_t offset )
+      int offset;
+      CachedAttributeData( int index, int offset )
         : index( index )
         , offset( offset )
       {}
diff --git a/tests/src/core/testqgspointcloudattribute.cpp b/tests/src/core/testqgspointcloudattribute.cpp
index 8c3a6de4b651..af3a2e33d606 100644
--- a/tests/src/core/testqgspointcloudattribute.cpp
+++ b/tests/src/core/testqgspointcloudattribute.cpp
@@ -79,7 +79,7 @@ void TestQgsPointCloudAttribute::testAttribute()
   QgsPointCloudAttribute attribute( QStringLiteral( "name" ), QgsPointCloudAttribute::DataType::Float );
   QCOMPARE( attribute.name(), QStringLiteral( "name" ) );
   QCOMPARE( attribute.type(), QgsPointCloudAttribute::DataType::Float );
-  QCOMPARE( attribute.size(), static_cast< std::size_t >( 4 ) );
+  QCOMPARE( attribute.size(), 4 );
 }
 
 void TestQgsPointCloudAttribute::testAttributeDisplayType()
@@ -106,7 +106,7 @@ void TestQgsPointCloudAttribute::testCollection()
   QgsPointCloudAttributeCollection collection;
   QVERIFY( collection.attributes().empty() );
   QCOMPARE( collection.count(), 0 );
-  QCOMPARE( collection.pointRecordSize(), static_cast< std::size_t >( 0 ) );
+  QCOMPARE( collection.pointRecordSize(), 0 );
   int offset = 0;
   QVERIFY( !collection.find( QStringLiteral( "test" ), offset ) );
 
@@ -115,7 +115,7 @@ void TestQgsPointCloudAttribute::testCollection()
   QCOMPARE( collection.count(), 1 );
   QCOMPARE( collection.at( 0 ).name(), QStringLiteral( "at1" ) );
   QCOMPARE( collection.attributes().at( 0 ).name(), QStringLiteral( "at1" ) );
-  QCOMPARE( collection.pointRecordSize(), static_cast< std::size_t >( 4 ) );
+  QCOMPARE( collection.pointRecordSize(), 4 );
   QVERIFY( !collection.find( QStringLiteral( "test" ), offset ) );
   QCOMPARE( collection.find( QStringLiteral( "at1" ), offset )->name(), QStringLiteral( "at1" ) );
   QCOMPARE( collection.indexOf( QStringLiteral( "test" ) ), -1 );
@@ -129,7 +129,7 @@ void TestQgsPointCloudAttribute::testCollection()
   QCOMPARE( collection.at( 1 ).name(), QStringLiteral( "at2" ) );
   QCOMPARE( collection.attributes().at( 0 ).name(), QStringLiteral( "at1" ) );
   QCOMPARE( collection.attributes().at( 1 ).name(), QStringLiteral( "at2" ) );
-  QCOMPARE( collection.pointRecordSize(), static_cast< std::size_t >( 6 ) );
+  QCOMPARE( collection.pointRecordSize(), 6 );
   QVERIFY( !collection.find( QStringLiteral( "test" ), offset ) );
   QCOMPARE( collection.find( QStringLiteral( "at1" ), offset )->name(), QStringLiteral( "at1" ) );
   QCOMPARE( offset, 0 );
@@ -145,7 +145,7 @@ void TestQgsPointCloudAttribute::testCollection()
   QCOMPARE( collection.attributes().at( 0 ).name(), QStringLiteral( "at1" ) );
   QCOMPARE( collection.attributes().at( 1 ).name(), QStringLiteral( "at2" ) );
   QCOMPARE( collection.attributes().at( 2 ).name(), QStringLiteral( "at3" ) );
-  QCOMPARE( collection.pointRecordSize(), static_cast< std::size_t >( 14 ) );
+  QCOMPARE( collection.pointRecordSize(), 14 );
   QVERIFY( !collection.find( QStringLiteral( "test" ), offset ) );
   QCOMPARE( collection.find( QStringLiteral( "at1" ), offset )->name(), QStringLiteral( "at1" ) );
   QCOMPARE( offset, 0 );
@@ -164,7 +164,7 @@ void TestQgsPointCloudAttribute::testCollection()
   QCOMPARE( collection2.attributes().at( 0 ).name(), QStringLiteral( "at1" ) );
   QCOMPARE( collection2.attributes().at( 1 ).name(), QStringLiteral( "at2" ) );
   QCOMPARE( collection2.attributes().at( 2 ).name(), QStringLiteral( "at3" ) );
-  QCOMPARE( collection2.pointRecordSize(), static_cast< std::size_t >( 14 ) );
+  QCOMPARE( collection2.pointRecordSize(), 14 );
   QVERIFY( !collection2.find( QStringLiteral( "test" ), offset ) );
   QCOMPARE( collection2.find( QStringLiteral( "at1" ), offset )->name(), QStringLiteral( "at1" ) );
   QCOMPARE( offset, 0 );