diff --git a/flying-saucer-core/src/main/java/org/xhtmlrenderer/css/parser/property/AbstractPropertyBuilder.java b/flying-saucer-core/src/main/java/org/xhtmlrenderer/css/parser/property/AbstractPropertyBuilder.java
index 6abb19ba7..758c24c00 100644
--- a/flying-saucer-core/src/main/java/org/xhtmlrenderer/css/parser/property/AbstractPropertyBuilder.java
+++ b/flying-saucer-core/src/main/java/org/xhtmlrenderer/css/parser/property/AbstractPropertyBuilder.java
@@ -42,7 +42,7 @@ public List<PropertyDeclaration> buildDeclarations(CSSName cssName, List<? exten
     protected void assertFoundUpToValues(CSSName cssName, List<? extends CSSPrimitiveValue> values, int max) {
         int found = values.size();
         if (found < 1 || found > max) {
-            throw new CSSParseException("Found %d value(s) for %s when between %d and %d value(s) were expected"
+            throw new CSSParseException("Found %d values for %s when between %d and %d value(s) were expected"
                     .formatted(found, cssName, 1, max), -1);
         }
     }
@@ -80,7 +80,7 @@ protected void checkIdentOrIntegerType(CSSName cssName, CSSPrimitiveValue value)
 
     protected void checkInteger(CSSName cssName, CSSPrimitiveValue value) {
         int type = value.getPrimitiveType();
-        if (type != CSS_NUMBER || 
+        if (type != CSS_NUMBER ||
                 (int) value.getFloatValue(CSS_NUMBER) != Math.round(value.getFloatValue(CSS_NUMBER))) {
             throw new CSSParseException("Value for " + cssName + " must be an integer", -1);
         }
diff --git a/flying-saucer-core/src/test/java/org/xhtmlrenderer/css/parser/property/SizePropertyBuilderTest.java b/flying-saucer-core/src/test/java/org/xhtmlrenderer/css/parser/property/SizePropertyBuilderTest.java
new file mode 100644
index 000000000..851332702
--- /dev/null
+++ b/flying-saucer-core/src/test/java/org/xhtmlrenderer/css/parser/property/SizePropertyBuilderTest.java
@@ -0,0 +1,72 @@
+package org.xhtmlrenderer.css.parser.property;
+
+import org.junit.jupiter.api.Test;
+import org.xhtmlrenderer.css.constants.CSSName;
+import org.xhtmlrenderer.css.parser.CSSParseException;
+import org.xhtmlrenderer.css.parser.PropertyValue;
+import org.xhtmlrenderer.css.sheet.PropertyDeclaration;
+
+import java.util.List;
+
+import static java.util.Collections.emptyList;
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+import static org.w3c.dom.css.CSSPrimitiveValue.CSS_IDENT;
+import static org.w3c.dom.css.CSSPrimitiveValue.CSS_MM;
+import static org.xhtmlrenderer.css.constants.CSSName.getByPropertyName;
+import static org.xhtmlrenderer.css.constants.IdentValue.AUTO;
+
+class SizePropertyBuilderTest {
+    private final SizePropertyBuilder builder = new SizePropertyBuilder();
+    private final PropertyValue width = new PropertyValue(CSS_MM, 0, "43mm");
+    private final PropertyValue height = new PropertyValue(CSS_MM, 0, "25mm");
+    private final PropertyValue landscape = new PropertyValue(CSS_IDENT, 0, "landscape");
+    private final CSSName cssName = getByPropertyName("size");
+
+    @Test
+    void buildDeclarationsFromOneValue() {
+        List<PropertyDeclaration> result = builder.buildDeclarations(cssName, List.of(width), 6, false);
+
+        assertThat(result).usingRecursiveFieldByFieldElementComparator().containsExactly(
+                new PropertyDeclaration(getByPropertyName("-fs-page-orientation"), new PropertyValue(AUTO), false, 6),
+                new PropertyDeclaration(getByPropertyName("-fs-page-width"), width, false, 6),
+                new PropertyDeclaration(getByPropertyName("-fs-page-height"), width, false, 6)
+        );
+    }
+
+    @Test
+    void buildDeclarationsFromTwoValues() {
+        List<PropertyDeclaration> result = builder.buildDeclarations(cssName, List.of(width, height), 6, false);
+
+        assertThat(result).usingRecursiveFieldByFieldElementComparator().containsExactly(
+                new PropertyDeclaration(getByPropertyName("-fs-page-orientation"), new PropertyValue(AUTO), false, 6),
+                new PropertyDeclaration(getByPropertyName("-fs-page-width"), width, false, 6),
+                new PropertyDeclaration(getByPropertyName("-fs-page-height"), height, false, 6)
+        );
+    }
+
+    @Test
+    void buildDeclarationsFromThreeValues() {
+        List<PropertyDeclaration> result = builder.buildDeclarations(cssName, List.of(width, height, landscape), 0, false);
+
+        assertThat(result).usingRecursiveFieldByFieldElementComparator().containsExactly(
+                new PropertyDeclaration(getByPropertyName("-fs-page-width"), width, false, 0),
+                new PropertyDeclaration(getByPropertyName("-fs-page-height"), height, false, 0),
+                new PropertyDeclaration(getByPropertyName("-fs-page-orientation"), landscape, false, 0)
+        );
+    }
+
+    @Test
+    void declarationMustHaveAtLeastOneValue() {
+        assertThatThrownBy(() -> builder.buildDeclarations(cssName, emptyList(), 6, false))
+                .isInstanceOf(CSSParseException.class)
+                .hasMessageStartingWith("Found 0 values for size");
+    }
+
+    @Test
+    void declarationMustHaveAtMostThreeValue() {
+        assertThatThrownBy(() -> builder.buildDeclarations(cssName, List.of(width, height, landscape, landscape), 6, false))
+                .isInstanceOf(CSSParseException.class)
+                .hasMessageStartingWith("Found 4 values for size");
+    }
+}
\ No newline at end of file