diff --git a/core/trino-spi/src/main/java/io/trino/spi/block/DictionaryBlock.java b/core/trino-spi/src/main/java/io/trino/spi/block/DictionaryBlock.java
index 20df70592aca..cd817d283b34 100644
--- a/core/trino-spi/src/main/java/io/trino/spi/block/DictionaryBlock.java
+++ b/core/trino-spi/src/main/java/io/trino/spi/block/DictionaryBlock.java
@@ -273,6 +273,12 @@ public long getLogicalSizeInBytes()
             return logicalSizeInBytes;
         }
 
+        OptionalInt dictionarySizePerPosition = dictionary.fixedSizeInBytesPerPosition();
+        if (dictionarySizePerPosition.isPresent()) {
+            logicalSizeInBytes = dictionarySizePerPosition.getAsInt() * (long) getPositionCount();
+            return logicalSizeInBytes;
+        }
+
         // Calculation of logical size can be performed as part of calculateCompactSize() with minor modifications.
         // Keeping this calculation separate as this is a little more expensive and may not be called as often.
         long sizeInBytes = 0;